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Volumn 114, Issue 1, 2007, Pages 92-98

Ten-Year Incidence and Progression of Age-Related Maculopathy. The Blue Mountains Eye Study

Author keywords

[No Author keywords available]

Indexed keywords

ADULT; AGED; ARTICLE; ATROPHY; AUSTRALIA; COHORT ANALYSIS; CONTROLLED STUDY; DISEASE COURSE; DISEASE SEVERITY; DRUSEN; EYE PHOTOGRAPHY; FEMALE; FOLLOW UP; HIGH RISK POPULATION; HUMAN; INCIDENCE; KAPLAN MEIER METHOD; MAJOR CLINICAL STUDY; MALE; POPULATION RESEARCH; PREDICTOR VARIABLE; PRIORITY JOURNAL; RETINA MACULA AGE RELATED DEGENERATION; RETINA NEOVASCULARIZATION; RETINA PIGMENT DEGENERATION; RISK ASSESSMENT; RISK FACTOR; SCORING SYSTEM; STANDARDIZATION; SURVIVOR;

EID: 33845754932     PISSN: 01616420     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.ophtha.2006.07.017     Document Type: Article
Times cited : (262)

References (49)
  • 1
    • 0029803235 scopus 로고    scopus 로고
    • The cause-specific prevalence of visual impairment in an urban population: the Baltimore Eye Survey
    • Rahmani B., Tielsch J.M., Katz J., et al. The cause-specific prevalence of visual impairment in an urban population: the Baltimore Eye Survey. Ophthalmology 103 (1996) 1721-1726
    • (1996) Ophthalmology , vol.103 , pp. 1721-1726
    • Rahmani, B.1    Tielsch, J.M.2    Katz, J.3
  • 2
    • 0031695623 scopus 로고    scopus 로고
    • Age-specific prevalence and causes of blindness and visual impairment in an older population: the Rotterdam Study
    • Klaver C.C., Wolfs R.C., Vingerling J.R., et al. Age-specific prevalence and causes of blindness and visual impairment in an older population: the Rotterdam Study. Arch Ophthalmol 116 (1998) 653-658
    • (1998) Arch Ophthalmol , vol.116 , pp. 653-658
    • Klaver, C.C.1    Wolfs, R.C.2    Vingerling, J.R.3
  • 3
    • 0033796842 scopus 로고    scopus 로고
    • Age-specific prevalence and causes of bilateral and unilateral visual impairment in older Australians: the Blue Mountains Eye Study
    • Wang J.J., Foran S., and Mitchell P. Age-specific prevalence and causes of bilateral and unilateral visual impairment in older Australians: the Blue Mountains Eye Study. Clin Experiment Ophthalmol 28 (2000) 268-273
    • (2000) Clin Experiment Ophthalmol , vol.28 , pp. 268-273
    • Wang, J.J.1    Foran, S.2    Mitchell, P.3
  • 4
    • 0036209840 scopus 로고    scopus 로고
    • Causes of blindness and visual impairment in a population-based sample of U.S. Hispanics
    • Rodriguez J., Sanchez R., Munoz B., et al. Causes of blindness and visual impairment in a population-based sample of U.S. Hispanics. Ophthalmology 109 (2002) 737-743
    • (2002) Ophthalmology , vol.109 , pp. 737-743
    • Rodriguez, J.1    Sanchez, R.2    Munoz, B.3
  • 5
    • 1442324340 scopus 로고    scopus 로고
    • Age-related macular degeneration causing visual impairment in people 75 years or older in Britain: an add-on study to the Medical Research Council Trial of Assessment and Management of Older People in the Community
    • Evans J.R., Fletcher A.E., and Wormald R.P. Age-related macular degeneration causing visual impairment in people 75 years or older in Britain: an add-on study to the Medical Research Council Trial of Assessment and Management of Older People in the Community. Ophthalmology 111 (2004) 513-517
    • (2004) Ophthalmology , vol.111 , pp. 513-517
    • Evans, J.R.1    Fletcher, A.E.2    Wormald, R.P.3
  • 6
    • 0038708118 scopus 로고    scopus 로고
    • Age-related macular degeneration: etiology, pathogenesis, and therapeutic strategies
    • Ambati J., Ambati B.K., Yoo S.H., et al. Age-related macular degeneration: etiology, pathogenesis, and therapeutic strategies. Surv Ophthalmol 48 (2003) 257-293
    • (2003) Surv Ophthalmol , vol.48 , pp. 257-293
    • Ambati, J.1    Ambati, B.K.2    Yoo, S.H.3
  • 7
    • 15044338733 scopus 로고    scopus 로고
    • Age-related macular degeneration 1969-2004: a 35-year personal perspective
    • Fine S.L. Age-related macular degeneration 1969-2004: a 35-year personal perspective. Am J Ophthalmol 139 (2005) 405-420
    • (2005) Am J Ophthalmol , vol.139 , pp. 405-420
    • Fine, S.L.1
  • 8
    • 0033510538 scopus 로고    scopus 로고
    • Racial differences in the prevalence of age-related macular degeneration: the Baltimore Eye Survey
    • Friedman D.S., Katz J., Bressler N.M., et al. Racial differences in the prevalence of age-related macular degeneration: the Baltimore Eye Survey. Ophthalmology 106 (1999) 1049-1055
    • (1999) Ophthalmology , vol.106 , pp. 1049-1055
    • Friedman, D.S.1    Katz, J.2    Bressler, N.M.3
  • 9
    • 0026681119 scopus 로고
    • Prevalence of age-related maculopathy: the Beaver Dam Eye Study
    • Klein R., Klein B.E., and Linton K.L. Prevalence of age-related maculopathy: the Beaver Dam Eye Study. Ophthalmology 99 (1992) 933-943
    • (1992) Ophthalmology , vol.99 , pp. 933-943
    • Klein, R.1    Klein, B.E.2    Linton, K.L.3
  • 10
    • 0029061539 scopus 로고
    • Features of age-related macular degeneration in a black population: the Barbados Eye Study Group
    • Schachat A.P., Hyman L., Leske M.C., et al. Features of age-related macular degeneration in a black population: the Barbados Eye Study Group. Arch Ophthalmol 113 (1995) 728-735
    • (1995) Arch Ophthalmol , vol.113 , pp. 728-735
    • Schachat, A.P.1    Hyman, L.2    Leske, M.C.3
  • 11
    • 0028839002 scopus 로고
    • The prevalence of age-related maculopathy in the Rotterdam Study
    • Vingerling J.R., Dielemans I., Hofman A., et al. The prevalence of age-related maculopathy in the Rotterdam Study. Ophthalmology 102 (1995) 205-210
    • (1995) Ophthalmology , vol.102 , pp. 205-210
    • Vingerling, J.R.1    Dielemans, I.2    Hofman, A.3
  • 12
    • 0028843796 scopus 로고
    • Prevalence of age-related maculopathy in Australia: the Blue Mountains Eye Study
    • Mitchell P., Smith W., Attebo K., and Wang J.J. Prevalence of age-related maculopathy in Australia: the Blue Mountains Eye Study. Ophthalmology 102 (1995) 1450-1460
    • (1995) Ophthalmology , vol.102 , pp. 1450-1460
    • Mitchell, P.1    Smith, W.2    Attebo, K.3    Wang, J.J.4
  • 13
    • 0032843833 scopus 로고    scopus 로고
    • Prevalence of age-related maculopathy in the Atherosclerosis Risk in Communities Study
    • Klein R., Clegg L., Cooper L.S., et al. Prevalence of age-related maculopathy in the Atherosclerosis Risk in Communities Study. Arch Ophthalmol 117 (1999) 1203-1210
    • (1999) Arch Ophthalmol , vol.117 , pp. 1203-1210
    • Klein, R.1    Clegg, L.2    Cooper, L.S.3
  • 14
    • 0033769628 scopus 로고    scopus 로고
    • The prevalence of age-related maculopathy: the Visual Impairment Project
    • VanNewkirk M.R., Nanjan M.B., Wang J.J., et al. The prevalence of age-related maculopathy: the Visual Impairment Project. Ophthalmology 107 (2000) 1593-1600
    • (2000) Ophthalmology , vol.107 , pp. 1593-1600
    • VanNewkirk, M.R.1    Nanjan, M.B.2    Wang, J.J.3
  • 15
    • 0034805186 scopus 로고    scopus 로고
    • Prevalence of age related maculopathy in a representative Japanese population: the Hisayama Study
    • Oshima Y., Ishibashi T., Murata T., et al. Prevalence of age related maculopathy in a representative Japanese population: the Hisayama Study. Br J Ophthalmol 85 (2001) 1153-1157
    • (2001) Br J Ophthalmol , vol.85 , pp. 1153-1157
    • Oshima, Y.1    Ishibashi, T.2    Murata, T.3
  • 16
    • 0037228021 scopus 로고    scopus 로고
    • Early age-related maculopathy in the Cardiovascular Health Study
    • Klein R., Klein B.E., Marino E.K., et al. Early age-related maculopathy in the Cardiovascular Health Study. Ophthalmology 110 (2003) 25-33
    • (2003) Ophthalmology , vol.110 , pp. 25-33
    • Klein, R.1    Klein, B.E.2    Marino, E.K.3
  • 17
    • 0037335023 scopus 로고    scopus 로고
    • The prevalence of age-related maculopathy in Iceland: Reykjavik Eye Study
    • Jonasson F., Arnarsson A., Sasaki H., et al. The prevalence of age-related maculopathy in Iceland: Reykjavik Eye Study. Arch Ophthalmol 121 (2003) 379-385
    • (2003) Arch Ophthalmol , vol.121 , pp. 379-385
    • Jonasson, F.1    Arnarsson, A.2    Sasaki, H.3
  • 18
    • 3042518918 scopus 로고    scopus 로고
    • Prevalence of age-related macular degeneration in Latinos. The Los Angeles Latino Eye Study
    • Varma R., Fraser-Bell S., Tan S., et al. Prevalence of age-related macular degeneration in Latinos. The Los Angeles Latino Eye Study. Ophthalmology 111 (2004) 1288-1297
    • (2004) Ophthalmology , vol.111 , pp. 1288-1297
    • Varma, R.1    Fraser-Bell, S.2    Tan, S.3
  • 19
    • 11144354339 scopus 로고    scopus 로고
    • Prevalence of age-related macular degeneration in the United States
    • Eye Diseases Prevalence Research Group
    • Eye Diseases Prevalence Research Group. Prevalence of age-related macular degeneration in the United States. Arch Ophthalmol 122 (2004) 564-572
    • (2004) Arch Ophthalmol , vol.122 , pp. 564-572
  • 20
    • 0037340036 scopus 로고    scopus 로고
    • How big is the burden of visual loss caused by age related macular degeneration in the United Kingdom?
    • Owen C.G., Fletcher A.E., Donoghue M., and Rudnicka A.R. How big is the burden of visual loss caused by age related macular degeneration in the United Kingdom?. Br J Ophthalmol 87 (2003) 312-317
    • (2003) Br J Ophthalmol , vol.87 , pp. 312-317
    • Owen, C.G.1    Fletcher, A.E.2    Donoghue, M.3    Rudnicka, A.R.4
  • 21
    • 0031056911 scopus 로고    scopus 로고
    • The five-year incidence and progression of age-related maculopathy: the Beaver Dam Eye Study
    • Klein R., Klein B.E., Jensen S.C., and Meuer S.M. The five-year incidence and progression of age-related maculopathy: the Beaver Dam Eye Study. Ophthalmology 104 (1997) 7-21
    • (1997) Ophthalmology , vol.104 , pp. 7-21
    • Klein, R.1    Klein, B.E.2    Jensen, S.C.3    Meuer, S.M.4
  • 22
    • 0034852996 scopus 로고    scopus 로고
    • Incidence and progression rates of age-related maculopathy: the Rotterdam Study
    • Klaver C.C., Assink J.J., van Leeuwen R., et al. Incidence and progression rates of age-related maculopathy: the Rotterdam Study. Invest Ophthalmol Vis Sci 42 (2001) 2237-2241
    • (2001) Invest Ophthalmol Vis Sci , vol.42 , pp. 2237-2241
    • Klaver, C.C.1    Assink, J.J.2    van Leeuwen, R.3
  • 23
    • 0036100775 scopus 로고    scopus 로고
    • Five-year incidence of age-related maculopathy lesions: the Blue Mountains Eye Study
    • Mitchell P., Wang J.J., Foran S., and Smith W. Five-year incidence of age-related maculopathy lesions: the Blue Mountains Eye Study. Ophthalmology 109 (2002) 1092-1097
    • (2002) Ophthalmology , vol.109 , pp. 1092-1097
    • Mitchell, P.1    Wang, J.J.2    Foran, S.3    Smith, W.4
  • 24
    • 0037388460 scopus 로고    scopus 로고
    • The risk and natural course of age-related maculopathy: follow-up at 6 1/2 years in the Rotterdam Study
    • van Leeuwen R., Klaver C.C., Vingerling J.R., et al. The risk and natural course of age-related maculopathy: follow-up at 6 1/2 years in the Rotterdam Study. Arch Ophthalmol 121 (2003) 519-526
    • (2003) Arch Ophthalmol , vol.121 , pp. 519-526
    • van Leeuwen, R.1    Klaver, C.C.2    Vingerling, J.R.3
  • 25
    • 2942514552 scopus 로고    scopus 로고
    • Five-year incidence of age-related maculopathy. The Visual Impairment Project
    • Mukesh B.N., Dimitrov P.N., Leikin S., et al. Five-year incidence of age-related maculopathy. The Visual Impairment Project. Ophthalmology 111 (2004) 1176-1182
    • (2004) Ophthalmology , vol.111 , pp. 1176-1182
    • Mukesh, B.N.1    Dimitrov, P.N.2    Leikin, S.3
  • 26
    • 11344255742 scopus 로고    scopus 로고
    • 5-year incidence of age-related maculopathy in the Reykjavik Eye Study
    • Jonasson F., Arnarsson A., Peto T., et al. 5-year incidence of age-related maculopathy in the Reykjavik Eye Study. Ophthalmology 112 (2005) 132-138
    • (2005) Ophthalmology , vol.112 , pp. 132-138
    • Jonasson, F.1    Arnarsson, A.2    Peto, T.3
  • 27
    • 22144469144 scopus 로고    scopus 로고
    • The 5-year incidence and risk factors for age-related maculopathy in a general Japanese population: the Hisayama Study
    • Miyazaki M., Kiyohara Y., Yoshida A., et al. The 5-year incidence and risk factors for age-related maculopathy in a general Japanese population: the Hisayama Study. Invest Ophthalmol Vis Sci 46 (2005) 1907-1910
    • (2005) Invest Ophthalmol Vis Sci , vol.46 , pp. 1907-1910
    • Miyazaki, M.1    Kiyohara, Y.2    Yoshida, A.3
  • 28
    • 0035078715 scopus 로고    scopus 로고
    • Risk factors for age-related macular degeneration: pooled findings from three continents
    • Smith W., Assink J., Klein R., et al. Risk factors for age-related macular degeneration: pooled findings from three continents. Ophthalmology 108 (2001) 697-704
    • (2001) Ophthalmology , vol.108 , pp. 697-704
    • Smith, W.1    Assink, J.2    Klein, R.3
  • 29
    • 3042662037 scopus 로고    scopus 로고
    • Risk factors for incident age-related macular degeneration. Pooled findings from 3 continents
    • Tomany S.C., Wang J.J., van Leeuwen R., et al. Risk factors for incident age-related macular degeneration. Pooled findings from 3 continents. Ophthalmology 111 (2004) 1280-1287
    • (2004) Ophthalmology , vol.111 , pp. 1280-1287
    • Tomany, S.C.1    Wang, J.J.2    van Leeuwen, R.3
  • 30
    • 0025942638 scopus 로고
    • The Wisconsin Age-Related Maculopathy Grading System
    • Klein R., Davis M., Magli Y., et al. The Wisconsin Age-Related Maculopathy Grading System. Ophthalmology 98 (1991) 1128-1134
    • (1991) Ophthalmology , vol.98 , pp. 1128-1134
    • Klein, R.1    Davis, M.2    Magli, Y.3
  • 31
    • 0028934221 scopus 로고
    • An international classification and grading system for age-related maculopathy and age-related macular degeneration
    • Bird A.C., Bressler N.M., Bressler S.B., et al. An international classification and grading system for age-related maculopathy and age-related macular degeneration. Surv Ophthalmol 39 (1995) 367-374
    • (1995) Surv Ophthalmol , vol.39 , pp. 367-374
    • Bird, A.C.1    Bressler, N.M.2    Bressler, S.B.3
  • 32
    • 27744516278 scopus 로고    scopus 로고
    • A simplified severity scale for age-related macular degeneration: AREDS report no. 18
    • Age-Related Eye Disease Study Research Group
    • Age-Related Eye Disease Study Research Group. A simplified severity scale for age-related macular degeneration: AREDS report no. 18. Arch Ophthalmol 123 (2005) 1570-1574
    • (2005) Arch Ophthalmol , vol.123 , pp. 1570-1574
  • 33
    • 0036788613 scopus 로고    scopus 로고
    • Ten-year incidence and progression of age-related maculopathy: the Beaver Dam Eye Study
    • Klein R., Klein B.E., Tomany S.C., et al. Ten-year incidence and progression of age-related maculopathy: the Beaver Dam Eye Study. Ophthalmology 109 (2002) 1767-1779
    • (2002) Ophthalmology , vol.109 , pp. 1767-1779
    • Klein, R.1    Klein, B.E.2    Tomany, S.C.3
  • 35
    • 0028299796 scopus 로고
    • Appropriate statistical methods to account for similarities in binary outcomes between fellow eyes
    • Katz J., Zeger S., and Liang K.Y. Appropriate statistical methods to account for similarities in binary outcomes between fellow eyes. Invest Ophthalmol Vis Sci 35 (1994) 2461-2465
    • (1994) Invest Ophthalmol Vis Sci , vol.35 , pp. 2461-2465
    • Katz, J.1    Zeger, S.2    Liang, K.Y.3
  • 36
    • 0026583111 scopus 로고
    • Accounting for the correlation between fellow eyes in regression analysis
    • Glynn R.J., and Rosner B. Accounting for the correlation between fellow eyes in regression analysis. Arch Ophthalmol 110 (1992) 381-387
    • (1992) Arch Ophthalmol , vol.110 , pp. 381-387
    • Glynn, R.J.1    Rosner, B.2
  • 37
    • 21044449290 scopus 로고    scopus 로고
    • Risk factors for age-related maculopathy in a 14-year follow-up study: the Copenhagen City Eye Study
    • Buch H., Vinding T., la Cour M., et al. Risk factors for age-related maculopathy in a 14-year follow-up study: the Copenhagen City Eye Study. Acta Ophthalmol Scand 83 (2005) 409-418
    • (2005) Acta Ophthalmol Scand , vol.83 , pp. 409-418
    • Buch, H.1    Vinding, T.2    la Cour, M.3
  • 38
    • 0017681515 scopus 로고
    • Senile disciform macular degeneration in the second eye
    • Gregor Z., Bird A.C., and Chisholm I.H. Senile disciform macular degeneration in the second eye. Br J Ophthalmol 61 (1977) 141-147
    • (1977) Br J Ophthalmol , vol.61 , pp. 141-147
    • Gregor, Z.1    Bird, A.C.2    Chisholm, I.H.3
  • 39
    • 0020634671 scopus 로고
    • The second eye of patients with senile macular degeneration
    • Strahlman E.R., Fine S.L., and Hillis A. The second eye of patients with senile macular degeneration. Arch Ophthalmol 101 (1983) 1191-1193
    • (1983) Arch Ophthalmol , vol.101 , pp. 1191-1193
    • Strahlman, E.R.1    Fine, S.L.2    Hillis, A.3
  • 40
    • 0025647191 scopus 로고
    • Second eye involvement in age-related macular degeneration: a four-year prospective study
    • Roy M., and Kaiser-Kupfer M. Second eye involvement in age-related macular degeneration: a four-year prospective study. Eye 4 (1990) 813-818
    • (1990) Eye , vol.4 , pp. 813-818
    • Roy, M.1    Kaiser-Kupfer, M.2
  • 41
    • 0027213771 scopus 로고
    • Five-year follow-up of fellow eyes of patients with age-related macular degeneration and unilateral extrafoveal choroidal neovascularization
    • Macular Photocoagulation Study Group
    • Macular Photocoagulation Study Group. Five-year follow-up of fellow eyes of patients with age-related macular degeneration and unilateral extrafoveal choroidal neovascularization. Arch Ophthalmol 111 (1993) 1189-1199
    • (1993) Arch Ophthalmol , vol.111 , pp. 1189-1199
  • 42
    • 0029163122 scopus 로고
    • Choroidal neovascularization in second eyes of patients with unilateral exudative age-related macular degeneration
    • Chang B., Yannuzzi L.A., Ladas I.D., et al. Choroidal neovascularization in second eyes of patients with unilateral exudative age-related macular degeneration. Ophthalmology 102 (1995) 1380-1386
    • (1995) Ophthalmology , vol.102 , pp. 1380-1386
    • Chang, B.1    Yannuzzi, L.A.2    Ladas, I.D.3
  • 43
    • 0031918492 scopus 로고    scopus 로고
    • High-risk characteristics of fellow eyes of patients with unilateral neovascular age-related macular degeneration
    • Sandberg M.A., Weiner A., Miller S., and Gaudio A.R. High-risk characteristics of fellow eyes of patients with unilateral neovascular age-related macular degeneration. Ophthalmology 105 (1998) 441-447
    • (1998) Ophthalmology , vol.105 , pp. 441-447
    • Sandberg, M.A.1    Weiner, A.2    Miller, S.3    Gaudio, A.R.4
  • 44
    • 0031873513 scopus 로고    scopus 로고
    • Age-related macular degeneration and risk factors for the development of choroidal neovascularization in the fellow eye
    • Pieramici D.J., and Bressler S.B. Age-related macular degeneration and risk factors for the development of choroidal neovascularization in the fellow eye. Curr Opin Ophthalmol 9 (1998) 38-46
    • (1998) Curr Opin Ophthalmol , vol.9 , pp. 38-46
    • Pieramici, D.J.1    Bressler, S.B.2
  • 45
    • 0033833611 scopus 로고    scopus 로고
    • The second eye of Japanese patients with unilateral exudative age related macular degeneration
    • Uyama M., Takahashi K., Ida N., et al. The second eye of Japanese patients with unilateral exudative age related macular degeneration. Br J Ophthalmol 84 (2000) 1018-1023
    • (2000) Br J Ophthalmol , vol.84 , pp. 1018-1023
    • Uyama, M.1    Takahashi, K.2    Ida, N.3
  • 46
    • 0038667890 scopus 로고    scopus 로고
    • Risk of age-related macular degeneration in eyes with macular drusen or hyperpigmentation: the Blue Mountains Eye Study cohort
    • Wang J.J., Foran S., Smith W., and Mitchell P. Risk of age-related macular degeneration in eyes with macular drusen or hyperpigmentation: the Blue Mountains Eye Study cohort. Arch Ophthalmol 121 (2003) 658-663
    • (2003) Arch Ophthalmol , vol.121 , pp. 658-663
    • Wang, J.J.1    Foran, S.2    Smith, W.3    Mitchell, P.4
  • 47
    • 27744508407 scopus 로고    scopus 로고
    • The Age-Related Eye Disease Study severity scale for age-related macular degeneration: AREDS report no. 17
    • Age-Related Eye Disease Study Research Group
    • Age-Related Eye Disease Study Research Group. The Age-Related Eye Disease Study severity scale for age-related macular degeneration: AREDS report no. 17. Arch Ophthalmol 123 (2005) 1484-1498
    • (2005) Arch Ophthalmol , vol.123 , pp. 1484-1498
  • 48
    • 27744469446 scopus 로고    scopus 로고
    • Age-Related Eye Disease Study Severity Scale and Simplified Severity Scale for Age-Related Macular Degeneration
    • Mitchell P., and Foran S. Age-Related Eye Disease Study Severity Scale and Simplified Severity Scale for Age-Related Macular Degeneration. Arch Ophthalmol 123 (2005) 1598-1599
    • (2005) Arch Ophthalmol , vol.123 , pp. 1598-1599
    • Mitchell, P.1    Foran, S.2
  • 49
    • 85041557368 scopus 로고    scopus 로고
    • Age related macular degeneration: smoking entails major risk of blindness [letter]
    • Kelly S.P., Edwards R., Elton P., and Mitchell P. Age related macular degeneration: smoking entails major risk of blindness [letter]. BMJ 326 (2003) 1458-1459
    • (2003) BMJ , vol.326 , pp. 1458-1459
    • Kelly, S.P.1    Edwards, R.2    Elton, P.3    Mitchell, P.4


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