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Volumn 21, Issue 5, 2015, Pages 1331-1352

Scientists Admitting to Plagiarism: A Meta-analysis of Surveys

Author keywords

Data fabrication; Data falsification; Plagiarism; Research integrity; Research misconduct; Survey methodology

Indexed keywords

HUMAN; META ANALYSIS; PUBLISHING; RESEARCH ETHICS; SCIENTIFIC MISCONDUCT; SELF REPORT;

EID: 84941917155     PISSN: 13533452     EISSN: 14715546     Source Type: Journal    
DOI: 10.1007/s11948-014-9600-6     Document Type: Article
Times cited : (85)

References (68)
  • 1
    • 80051768165 scopus 로고    scopus 로고
    • Information systems research behaviors: What are the normative standards?
    • Allen, G. N., Ball, N. L., & Smith, H. J. (2011). Information systems research behaviors: What are the normative standards? MIS Quarterly,35(3), 533–551.
    • (2011) MIS Quarterly , vol.35 , Issue.3 , pp. 533-551
    • Allen, G.N.1    Ball, N.L.2    Smith, H.J.3
  • 2
    • 78650650687 scopus 로고    scopus 로고
    • The problem of plagiarism
    • Anderson, M. S., & Steneck, N. H. (2011). The problem of plagiarism. Urologic Oncology,29(1), 90–94.
    • (2011) Urologic Oncology , vol.29 , Issue.1 , pp. 90-94
    • Anderson, M.S.1    Steneck, N.H.2
  • 4
    • 84857859318 scopus 로고    scopus 로고
    • Plagiarism detection-quality management tool for all scientific journals
    • Baždarić, K. (2012). Plagiarism detection-quality management tool for all scientific journals. Croatian Medical Journal,53(1), 1–3.
    • (2012) Croatian Medical Journal , vol.53 , Issue.1 , pp. 1-3
    • Baždarić, K.1
  • 6
    • 0030307232 scopus 로고    scopus 로고
    • Survey of ethical issues in dental research
    • Bebeau, M. J., & Davis, E. L. (1996). Survey of ethical issues in dental research. Journal of Dental Research,75(2), 845–855.
    • (1996) Journal of Dental Research , vol.75 , Issue.2 , pp. 845-855
    • Bebeau, M.J.1    Davis, E.L.2
  • 7
    • 78650916012 scopus 로고    scopus 로고
    • Management science on the credibility bubble: Cardinal sins and various misdemeanors
    • Bedeian, A., Taylor, S., & Miller, A. (2010). Management science on the credibility bubble: Cardinal sins and various misdemeanors. The Academy of Management Learning and Education,9, 715–725.
    • (2010) The Academy of Management Learning and Education , vol.9 , pp. 715-725
    • Bedeian, A.1    Taylor, S.2    Miller, A.3
  • 8
    • 85011501427 scopus 로고    scopus 로고
    • Recycling texts or stealing time? Plagiarism, authorship, and credit in science
    • Biagioli, M. (2012). Recycling texts or stealing time? Plagiarism, authorship, and credit in science. International Journal of Cultural Property,19, 453–476.
    • (2012) International Journal of Cultural Property , vol.19 , pp. 453-476
    • Biagioli, M.1
  • 9
    • 0034179011 scopus 로고    scopus 로고
    • Ethical practice in the accounting publishing process: Contrasting opinions of authors and editors
    • Borkowski, S., & Welsh, M. (2000). Ethical practice in the accounting publishing process: Contrasting opinions of authors and editors. Journal of Business Ethics,25, 15–31.
    • (2000) Journal of Business Ethics , vol.25 , pp. 15-31
    • Borkowski, S.1    Welsh, M.2
  • 10
    • 84871344958 scopus 로고    scopus 로고
    • Misconduct policies in high-impact biomedical journals
    • Bosch, X., Hernandez, C., Pericas, J. M., Doti, P., & Marusic, A. (2012). Misconduct policies in high-impact biomedical journals. PLoS ONE,7(12), e51928.
    • (2012) PLoS ONE , vol.7 , Issue.12 , pp. 51928
    • Bosch, X.1    Hernandez, C.2    Pericas, J.M.3    Doti, P.4    Marusic, A.5
  • 11
    • 49749089724 scopus 로고    scopus 로고
    • Plagiarism: Words and ideas
    • Bouville, M. (2008). Plagiarism: Words and ideas. Science and Engineering Ethics,14(3), 311–322.
    • (2008) Science and Engineering Ethics , vol.14 , Issue.3 , pp. 311-322
    • Bouville, M.1
  • 12
    • 0036219251 scopus 로고    scopus 로고
    • Observations of ethical misconduct among industrial hygienists in England
    • Burgess, G. L., & Mullen, D. (2002). Observations of ethical misconduct among industrial hygienists in England. AIHA Journal,63(2), 151–155.
    • (2002) AIHA Journal , vol.63 , Issue.2 , pp. 151-155
    • Burgess, G.L.1    Mullen, D.2
  • 13
    • 77954484021 scopus 로고    scopus 로고
    • Journals step up plagiarism policing
    • Butler, D. (2010). Journals step up plagiarism policing. Nature,466(7303), 167.
    • (2010) Nature , vol.466 , Issue.7303 , pp. 167
    • Butler, D.1
  • 14
    • 4043150722 scopus 로고    scopus 로고
    • Research integrity: An exploratory survey of administrative science faculties
    • Cossette, P. (2004). Research integrity: An exploratory survey of administrative science faculties. Journal of Business Ethics,49(3), 213–234.
    • (2004) Journal of Business Ethics , vol.49 , Issue.3 , pp. 213-234
    • Cossette, P.1
  • 15
    • 84901842405 scopus 로고    scopus 로고
    • Public misconduct among medical professionals in India
    • Dhingra, D., & Mishra, D. (2014). Public misconduct among medical professionals in India. Indian Journal of Medical Ethics,11(2), 104–107.
    • (2014) Indian Journal of Medical Ethics , vol.11 , Issue.2 , pp. 104-107
    • Dhingra, D.1    Mishra, D.2
  • 16
    • 4043175267 scopus 로고    scopus 로고
    • Research ethics of business academic researchers at AACSB institutions
    • Dotterweich, D., & Garrison, S. (1998). Research ethics of business academic researchers at AACSB institutions. Teaching Business Ethics,1(4), 431–447.
    • (1998) Teaching Business Ethics , vol.1 , Issue.4 , pp. 431-447
    • Dotterweich, D.1    Garrison, S.2
  • 17
    • 0029677136 scopus 로고    scopus 로고
    • Ethical issues in biomedical research: Perceptions and practices of postdoctoral research fellows responding to a survey
    • Eastwood, S., Derish, P., Leash, E., & Ordway, S. (1996). Ethical issues in biomedical research: Perceptions and practices of postdoctoral research fellows responding to a survey. Science and Engineering Ethics,2(1), 89–114.
    • (1996) Science and Engineering Ethics , vol.2 , Issue.1 , pp. 89-114
    • Eastwood, S.1    Derish, P.2    Leash, E.3    Ordway, S.4
  • 19
    • 58149193218 scopus 로고    scopus 로고
    • Déjà vu: A database of highly similar citations in the scientific literature
    • Errami, M., Sun, Z., Long, T. C., George, A. C., and Garner, H. R. (2009). Déjà vu: A database of highly similar citations in the scientific literature. Nucleic Acids Research, 37(Database issue), D921-4.
    • (2009) Nucleic Acids Research , vol.37 , Issue.Database issue , pp. 921-924
    • Errami, M.1    Sun, Z.2    Long, T.C.3    George, A.C.4    Garner, H.R.5
  • 20
    • 66849084202 scopus 로고    scopus 로고
    • How many scientists fabricate and falsify research? A systematic review and meta-analysis of survey data
    • Fanelli, D. (2009). How many scientists fabricate and falsify research? A systematic review and meta-analysis of survey data. PLoS ONE,4(5), e5738.
    • (2009) PLoS ONE , vol.4 , Issue.5 , pp. 5738
    • Fanelli, D.1
  • 21
    • 77956329449 scopus 로고    scopus 로고
    • Positive” results increase down the Hierarchy of the Sciences
    • Fanelli, D. (2010). “Positive” results increase down the Hierarchy of the Sciences. PLoS ONE,5, e10068.
    • (2010) PLoS ONE , vol.5 , pp. 10068
    • Fanelli, D.1
  • 22
    • 84892898739 scopus 로고    scopus 로고
    • Why growing retractions are (mostly) a good sign
    • Fanelli, D. (2013). Why growing retractions are (mostly) a good sign. PLoS Medicine,10(12), e1001563.
    • (2013) PLoS Medicine , vol.10 , Issue.12 , pp. 1001563
    • Fanelli, D.1
  • 23
    • 84879478453 scopus 로고    scopus 로고
    • Bibliometric evidence for a hierarchy of the sciences
    • Fanelli, D., & Glänzel, W. (2013). Bibliometric evidence for a hierarchy of the sciences. PLoS ONE,8(6), e66938.
    • (2013) PLoS ONE , vol.8 , Issue.6 , pp. 66938
    • Fanelli, D.1    Glänzel, W.2
  • 25
    • 84867637990 scopus 로고    scopus 로고
    • Misconduct accounts for the majority of retracted scientific publications
    • Fang, F. C., Steen, R. G., & Casadevall, A. (2012). Misconduct accounts for the majority of retracted scientific publications. PNAS,109(42), 17028–17033.
    • (2012) PNAS , vol.109 , Issue.42 , pp. 17028-17033
    • Fang, F.C.1    Steen, R.G.2    Casadevall, A.3
  • 26
    • 21144473928 scopus 로고
    • Social desirability bias and the validity of indirect questioning
    • Fisher, R. J. (1993). Social desirability bias and the validity of indirect questioning. Journal of Consumer Research,20(2), 303–315.
    • (1993) Journal of Consumer Research , vol.20 , Issue.2 , pp. 303-315
    • Fisher, R.J.1
  • 27
    • 0034789122 scopus 로고    scopus 로고
    • A survey of newly appointed consultants’ attitudes towards research fraud
    • Geggie, D. (2001). A survey of newly appointed consultants’ attitudes towards research fraud. Journal of Medical Ethics,27(5), 344–346.
    • (2001) Journal of Medical Ethics , vol.27 , Issue.5 , pp. 344-346
    • Geggie, D.1
  • 28
    • 19644368505 scopus 로고    scopus 로고
    • Taking on the cheats
    • Giles, J. (2005). Taking on the cheats. Nature,435, 258–259.
    • (2005) Nature , vol.435 , pp. 258-259
    • Giles, J.1
  • 29
    • 84875751438 scopus 로고    scopus 로고
    • Guidance on research integrity: No union in Europe
    • Godecharle, S., Nemery, B., & Dierickx, K. (2013). Guidance on research integrity: No union in Europe. Lancet,381, 1097–1098.
    • (2013) Lancet , vol.381 , pp. 1097-1098
    • Godecharle, S.1    Nemery, B.2    Dierickx, K.3
  • 30
    • 0028398909 scopus 로고
    • Ethical challenges to risk scientists: An exploratory analysis of survey data
    • Greenberg, M., & Goldberg, L. (1994). Ethical challenges to risk scientists: An exploratory analysis of survey data. Science, Technology and Human Values,19(2), 223–241.
    • (1994) Science, Technology and Human Values , vol.19 , Issue.2 , pp. 223-241
    • Greenberg, M.1    Goldberg, L.2
  • 31
    • 84859082657 scopus 로고    scopus 로고
    • The fox in the hen house: A critical examination of plagiarism among members of the academy of management
    • Honig, B., & Bedi, A. (2012). The fox in the hen house: A critical examination of plagiarism among members of the academy of management. Academy of Management Learning & Education,11(1), 101–123.
    • (2012) Academy of Management Learning & Education , vol.11 , Issue.1 , pp. 101-123
    • Honig, B.1    Bedi, A.2
  • 32
    • 84941891102 scopus 로고    scopus 로고
    • Response to Horrom TA. The perils of copy and paste: Plagiarism in scientific publishing. Journal of Rehabilitation Research & Development, 49(8)
    • Horrom, T. A. (2012). Response to Horrom TA. The perils of copy and paste: Plagiarism in scientific publishing. Journal of Rehabilitation Research & Development, 49(8), vii–xii.
    • (2012) vii–xii
    • Horrom, T.A.1
  • 33
    • 55349132400 scopus 로고    scopus 로고
    • Interpretation of tests of heterogeneity and bias in meta-analysis
    • Ioannidis, J. P. (2008). Interpretation of tests of heterogeneity and bias in meta-analysis. Journal of Evaluation in Clinical Practice,14(5), 951–957.
    • (2008) Journal of Evaluation in Clinical Practice , vol.14 , Issue.5 , pp. 951-957
    • Ioannidis, J.P.1
  • 34
    • 84861748584 scopus 로고    scopus 로고
    • Measuring the prevalence of questionable research practices with incentives for truth telling
    • John, L., Loewenstein, G., & Prelec, D. (2012). Measuring the prevalence of questionable research practices with incentives for truth telling. Psychological Science,23(5), 524–532.
    • (2012) Psychological Science , vol.23 , Issue.5 , pp. 524-532
    • John, L.1    Loewenstein, G.2    Prelec, D.3
  • 35
    • 0026452301 scopus 로고
    • A pilot-study of biomedical trainees perceptions concerning research ethics
    • Kalichman, M. W., & Friedman, P. J. (1992). A pilot-study of biomedical trainees perceptions concerning research ethics. Academic Medicine,67(11), 769–775.
    • (1992) Academic Medicine , vol.67 , Issue.11 , pp. 769-775
    • Kalichman, M.W.1    Friedman, P.J.2
  • 36
    • 84962962498 scopus 로고    scopus 로고
    • Health education research and publication: Ethical considerations and the response of health educators. PhD thesis, Southern Illinois University Carbondale
    • Illinois, United States
    • Kattenbraker, M. S. (2007). Health education research and publication: Ethical considerations and the response of health educators. PhD thesis, Southern Illinois University Carbondale, Carbondale, Illinois, United States.
    • (2007) Carbondale
    • Kattenbraker, M.S.1
  • 38
    • 84875674128 scopus 로고    scopus 로고
    • Views of academicians on research ethics
    • Koklu, N. (2003). Views of academicians on research ethics. Journal of Educational Sciences & Practices,2(4), 138–151.
    • (2003) Journal of Educational Sciences & Practices , vol.2 , Issue.4 , pp. 138-151
    • Koklu, N.1
  • 40
    • 0035961567 scopus 로고    scopus 로고
    • A comparison of methods to detect publication bias in meta-analysis
    • Macaskill, P., Walter, S. D., & Irwig, L. (2001). A comparison of methods to detect publication bias in meta-analysis. Statistics in Medicine,20(4), 641–654.
    • (2001) Statistics in Medicine , vol.20 , Issue.4 , pp. 641-654
    • Macaskill, P.1    Walter, S.D.2    Irwig, L.3
  • 41
    • 84876831534 scopus 로고    scopus 로고
    • Whither research integrity? Plagiarism, self-plagiarism and coercive citation in an age of research assessment
    • Martin, B. R. (2013). Whither research integrity? Plagiarism, self-plagiarism and coercive citation in an age of research assessment. Research Policy,42(5), 1005–1014.
    • (2013) Research Policy , vol.42 , Issue.5 , pp. 1005-1014
    • Martin, B.R.1
  • 43
    • 20444489208 scopus 로고    scopus 로고
    • Scientists behaving badly
    • Martinson, B. C., Anderson, M. S., & De Vries, R. (2005). Scientists behaving badly. Nature,435(7043), 737–738.
    • (2005) Nature , vol.435 , Issue.7043 , pp. 737-738
    • Martinson, B.C.1    Anderson, M.S.2    De Vries, R.3
  • 45
    • 84856452016 scopus 로고    scopus 로고
    • A systematic review of research on the meaning, ethics and practices of authorship across scholarly disciplines
    • Marušić, A., Bošnjak, L., & Jerončić, A. (2011). A systematic review of research on the meaning, ethics and practices of authorship across scholarly disciplines. PLoS ONE,6(9), e23477.
    • (2011) PLoS ONE , vol.6 , Issue.9 , pp. 23477
    • Marušić, A.1    Bošnjak, L.2    Jerončić, A.3
  • 46
    • 33748760733 scopus 로고    scopus 로고
    • research misconduct: A pilot study of British addiction researchers
    • May, C., Campbell, S., & Doyle, H. (1998). research misconduct: A pilot study of British addiction researchers. Addiction Research & Theory,6(4), 371–373.
    • (1998) Addiction Research & Theory , vol.6 , Issue.4 , pp. 371-373
    • May, C.1    Campbell, S.2    Doyle, H.3
  • 47
    • 77955901716 scopus 로고    scopus 로고
    • Scientific dishonesty—questionnaire to doctoral students in Sweden
    • Nilstun, T., Löfmark, R., & Lundqvist, A. (2010). Scientific dishonesty—questionnaire to doctoral students in Sweden. Journal of Medical Ethics,36(5), 315–318.
    • (2010) Journal of Medical Ethics , vol.36 , Issue.5 , pp. 315-318
    • Nilstun, T.1    Löfmark, R.2    Lundqvist, A.3
  • 48
    • 84941924296 scopus 로고    scopus 로고
    • NSF. (2013). Semiannual Report to the Congress. Accessed 14 April 2014
    • NSF. (2013). Semiannual Report to the Congress. http://www.nsf.gov/pubs/2014/oig14001/oig14001.pdf. Accessed 14 April 2014.
  • 49
    • 84887820536 scopus 로고    scopus 로고
    • Prevalence of scientific misconduct among a group of researchers in nigeria
    • Okonta, P., & Rossouw, T. (2013). Prevalence of scientific misconduct among a group of researchers in nigeria. Developing World Bioethics,13(3), 149–157.
    • (2013) Developing World Bioethics , vol.13 , Issue.3 , pp. 149-157
    • Okonta, P.1    Rossouw, T.2
  • 50
    • 84941906583 scopus 로고
    • Policy on plagiarism. ORI Newsletter, 3(1).http://ori.hhs.gov/ori-policy-plagiarism
    • ORI. (1994). Policy on plagiarism. ORI Newsletter, 3(1).http://ori.hhs.gov/ori-policy-plagiarism. Accessed 8 Augest 2014.
    • (1994) Accessed 8 Augest , pp. 2014
  • 51
    • 84941927614 scopus 로고    scopus 로고
    • ORI. (2000–2011). The office of research integrity annual report. Accessed 14 March 2014
    • ORI. (2000–2011). The office of research integrity annual report. http://ori.hhs.gov/annual_reports. Accessed 14 March 2014.
  • 52
    • 77954512263 scopus 로고    scopus 로고
    • Plagiarism pinioned. (2010). Nature, 466(7303): 159–160.
    • (2010) Nature , vol.466 , Issue.7303 , pp. 159-160
    • pinioned, P.1
  • 53
    • 0001056460 scopus 로고
    • The social desirability response bias in ethics research
    • Randall, D., & Fernandes, M. (1991). The social desirability response bias in ethics research. Journal of Business Ethics,10(11), 805–817.
    • (1991) Journal of Business Ethics , vol.10 , Issue.11 , pp. 805-817
    • Randall, D.1    Fernandes, M.2
  • 54
    • 78650146214 scopus 로고    scopus 로고
    • Self-plagiarism case prompts calls for agencies to tighten rules
    • Reich, E. (2010). Self-plagiarism case prompts calls for agencies to tighten rules. Nature,468, 745.
    • (2010) Nature , vol.468 , pp. 745
    • Reich, E.1
  • 56
    • 84875447857 scopus 로고    scopus 로고
    • Policies and initiatives aimed at addressing research misconduct in high-income countries
    • Resnik, D., & Master, Z. (2013). Policies and initiatives aimed at addressing research misconduct in high-income countries. PLoS Medicine,10(3), e1001406.
    • (2013) PLoS Medicine , vol.10 , Issue.3 , pp. 1001406
    • Resnik, D.1    Master, Z.2
  • 57
    • 78549256764 scopus 로고    scopus 로고
    • Research integrity in China: Problems and prospects
    • Resnik, D. B., & Zeng, W. (2010). Research integrity in China: Problems and prospects. Developing World Bioethics,10(3), 164–171.
    • (2010) Developing World Bioethics , vol.10 , Issue.3 , pp. 164-171
    • Resnik, D.B.1    Zeng, W.2
  • 58
    • 0028439943 scopus 로고
    • Research universities and scientific misocnduct
    • Steneck, N. H. (1994). Research universities and scientific misocnduct. Journal of Higher Education,65(3), 310–330.
    • (1994) Journal of Higher Education , vol.65 , Issue.3 , pp. 310-330
    • Steneck, N.H.1
  • 59
    • 84878763691 scopus 로고    scopus 로고
    • Biochemia medica has started using the crosscheck plagiarism detection software powered by iThenticate
    • Supak-Smolcic, V., & Simundic, A. M. (2013). Biochemia medica has started using the crosscheck plagiarism detection software powered by iThenticate. Biochemia Medica,23(2), 139–140.
    • (2013) Biochemia Medica , vol.23 , Issue.2 , pp. 139-140
    • Supak-Smolcic, V.1    Simundic, A.M.2
  • 60
    • 85050788052 scopus 로고
    • Ethical problems in academic research
    • Swazey, J., Anderson, M., & Louis, K. (1993). Ethical problems in academic research. American Scientist,81, 542–553.
    • (1993) American Scientist , vol.81 , pp. 542-553
    • Swazey, J.1    Anderson, M.2    Louis, K.3
  • 61
    • 0023646639 scopus 로고
    • Fraud will out-or will it?
    • Tangney, J. P. (1987). Fraud will out-or will it? New Scientist,115(1572), 62–63.
    • (1987) New Scientist , vol.115 , Issue.1572 , pp. 62-63
    • Tangney, J.P.1
  • 62
    • 0038726233 scopus 로고    scopus 로고
    • Adjusting for publication bias in the presence of heterogeneity
    • Terrin, N., Schmid, C. H., Lau, J., & Olkin, I. (2003). Adjusting for publication bias in the presence of heterogeneity. Statistics in Medicine,22, 2113–2126.
    • (2003) Statistics in Medicine , vol.22 , pp. 2113-2126
    • Terrin, N.1    Schmid, C.H.2    Lau, J.3    Olkin, I.4
  • 63
    • 45749126549 scopus 로고    scopus 로고
    • Repairing research integrity
    • Titus, S. L., Wells, J. A., & Rhoades, L. J. (2008). Repairing research integrity. Nature,453(7198), 980.
    • (2008) Nature , vol.453 , Issue.7198 , pp. 980
    • Titus, S.L.1    Wells, J.A.2    Rhoades, L.J.3
  • 64
    • 84941894374 scopus 로고    scopus 로고
    • U.S. Federal Research Misconduct Policy. (2000). Accessed 12 May 2014
    • U.S. Federal Research Misconduct Policy. (2000) http://www.aps.org/policy/statements/federalpolicy.cfm. Accessed 12 May 2014.
  • 65
    • 77958110812 scopus 로고    scopus 로고
    • Conducting meta-analyses in R with the metafor package
    • Viechtbauer, W. (2010). Conducting meta-analyses in R with the metafor package. Journal of Statistical Software,36(3), 1–48.
    • (2010) Journal of Statistical Software , vol.36 , Issue.3 , pp. 1-48
    • Viechtbauer, W.1
  • 66
    • 84861462024 scopus 로고    scopus 로고
    • How should editors respond to plagiarism?
    • Wager, E. (2011). How should editors respond to plagiarism? COPE discussion paper. http://publicationethics.org/resources/discussion-documents. Accessed 12 June 2014.
    • (2011) COPE discussion paper
    • Wager, E.1
  • 67
    • 67249153632 scopus 로고    scopus 로고
    • Science journal editors’ views on publication ethics: Results of an international survey
    • Wager, E., Fiack, S., Graf, C., Robinson, A., & Rowlands, I. (2009). Science journal editors’ views on publication ethics: Results of an international survey. Journal of Medical Ethics,35, 348–353.
    • (2009) Journal of Medical Ethics , vol.35 , pp. 348-353
    • Wager, E.1    Fiack, S.2    Graf, C.3    Robinson, A.4    Rowlands, I.5
  • 68
    • 84867129536 scopus 로고    scopus 로고
    • A survey on the use of CrossCheck for detecting plagiarism in journal articles
    • Zhang, Y. H., & Jia, X. (2012). A survey on the use of CrossCheck for detecting plagiarism in journal articles. Journal of Zhejiang University-SCIENCE (A/B/C) PR China,25(4), 292–307.
    • (2012) Journal of Zhejiang University-SCIENCE (A/B/C) PR China , vol.25 , Issue.4 , pp. 292-307
    • Zhang, Y.H.1    Jia, X.2


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