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Volumn 36, Issue 2, 2011, Pages 210-218

Short-term stability of resting heart rate variability: Influence of position and gender

Author keywords

Autonomic control; Gender; Heart rate; Parasympathetic; Reproducibility; Resting position

Indexed keywords

ADULT; ANALYSIS OF VARIANCE; ARTICLE; BODY POSTURE; ELECTROCARDIOGRAPHY; FEMALE; HEART RATE; HUMAN; MALE; PHYSIOLOGY; REFERENCE VALUE; REPRODUCIBILITY; REST; SEX DIFFERENCE; TIME;

EID: 79954604124     PISSN: 17155312     EISSN: 17155320     Source Type: Journal    
DOI: 10.1139/h10-103     Document Type: Article
Times cited : (78)

References (37)
  • 1
    • 0019827638 scopus 로고
    • Power spectrum analysis of heart rate fluctuation: A quantitative probe of beat-to-beat cardiovascular control
    • doi:10.1126/science. 6166045. PMID:6166045
    • Akselrod, S., Gordon, D., Ubel, F.A., Shannon, D.C., Berger, A.C., and Cohen, R.J. 1981. Power spectrum analysis of heart rate fluctuation: a quantitative probe of beat-to-beat cardiovascular control. Science, 213(4504): 220-222. doi:10.1126/science. 6166045. PMID:6166045.
    • (1981) Science , vol.213 , Issue.4504 , pp. 220-222
    • Akselrod, S.1    Gordon, D.2    Ubel, F.A.3    Shannon, D.C.4    Berger, A.C.5    Cohen, R.J.6
  • 3
    • 0031790628 scopus 로고    scopus 로고
    • Statistical methods for assessing measurement error (reliability) in variables relevant to sports medicine
    • doi:10.2165/ 00007256-199826040-00002. PMID:9820922
    • Atkinson, G., and Nevill, A.M. 1998. Statistical methods for assessing measurement error (reliability) in variables relevant to sports medicine. Sports Med. 26(4): 217-238. doi:10.2165/ 00007256-199826040-00002. PMID:9820922.
    • (1998) Sports Med , vol.26 , Issue.4 , pp. 217-238
    • Atkinson, G.1    Nevill, A.M.2
  • 4
    • 17944386481 scopus 로고    scopus 로고
    • Short-term heart rate variability in young athletes
    • PMID:11433833
    • Aubert, A.E., Beckers, F., and Ramaekers, D. 2001. Short-term heart rate variability in young athletes. J. Cardiol. 37(SUPPL. 1): 85-88. PMID:11433833.
    • (2001) J. Cardiol , vol.37 , Issue.SUPPL. 1 , pp. 85-88
    • Aubert, A.E.1    Beckers, F.2    Ramaekers, D.3
  • 5
    • 0034069136 scopus 로고    scopus 로고
    • Effects of controlled breathing, mental activity and mental stress with or without verbalization on heart rate variability
    • doi:10. 1016/S0735-1097(00)00595-7. PMID:10807448
    • Bernardi, L., Wdowczyk-Szulc, J., Valenti, C., Castoldi, S., Passino, C., Spadacini, G., and Sleight, P. 2000. Effects of controlled breathing, mental activity and mental stress with or without verbalization on heart rate variability. J.Am. Coll. Cardiol. 35(6): 1462-1469. doi:10. 1016/S0735-1097(00)00595-7. PMID:10807448.
    • (2000) J.Am. Coll. Cardiol , vol.35 , Issue.6 , pp. 1462-1469
    • Bernardi, L.1    Wdowczyk-Szulc, J.2    Valenti, C.3    Castoldi, S.4    Passino, C.5    Spadacini, G.6    Sleight, P.7
  • 6
    • 0028951502 scopus 로고
    • RR variability in healthy, middle-aged persons compared with patients with chronic coronary heart disease or recent acute myocardial infarction
    • PMID:7895350
    • Bigger, J.T., Jr, Fleiss, J.L., Steinman, R.C., Rolnitzky, L.M, Schneider, W.J., and Stein, P.K. 1995. RR variability in healthy, middle-aged persons compared with patients with chronic coronary heart disease or recent acute myocardial infarction. Circulation, 91(7): 1936-1943. PMID:7895350.
    • (1995) Circulation , vol.91 , Issue.7 , pp. 1936-1943
    • Bigger Jr., J.T.1    Fleiss, J.L.2    Steinman, R.C.3    Rolnitzky, L.M.4    Schneider, W.J.5    Stein, P.K.6
  • 7
    • 1442335812 scopus 로고    scopus 로고
    • Mortality in patients after a recent myocardial infarction: A randomized, placebo-controlled trial of Azimilide using heart rate variability for risk stratification
    • AzimiLide post Infarct surVival Evaluation (ALIVE) Investigators, doi:10.1161/01.CIR.0000117090. 01718.2A. PMID:14967728
    • Camm, A.J., Pratt, C.M., Schwartz, P.J., Al-Khalidi, H.R., Spyt, M.J., and Holroyde, M.J.; AzimiLide post Infarct surVival Evaluation (ALIVE) Investigators. 2004. Mortality in patients after a recent myocardial infarction: a randomized, placebo-controlled trial of Azimilide using heart rate variability for risk stratification. Circulation, 109(8): 990-996. doi:10.1161/01.CIR.0000117090. 01718.2A. PMID:14967728.
    • (2004) Circulation , vol.109 , Issue.8 , pp. 990-996
    • Camm, A.J.1    Pratt, C.M.2    Schwartz, P.J.3    Al-Khalidi, H.R.4    Spyt, M.J.5    Holroyde, M.J.6
  • 8
    • 0000661123 scopus 로고
    • In Heart Rate Variability. Edited by M. Malik and A.J. Camm. Futura Publishing Company Inc., Armonk, N.Y., USA
    • Fallen, E.L., and Kamath, M.V. 1995. Circadian rhythms of heart rate variability. In Heart Rate Variability. Edited by M. Malik and A.J. Camm. Futura Publishing Company Inc., Armonk, N.Y., USA. pp. 293-310.
    • (1995) Circadian Rhythms of Heart Rate Variability , pp. 293-310
    • Fallen, E.L.1    Kamath, M.V.2
  • 9
    • 0029986390 scopus 로고    scopus 로고
    • Short- and longterm assessment of heart rate variability for risk stratification after acute myocardial infarction
    • doi:10.1016/S0002-9149(97)89199-0. PMID:8651116
    • Fei, L., Copie, X., Malik, M., and Camm, A.J. 1996. Short- and longterm assessment of heart rate variability for risk stratification after acute myocardial infarction. Am. J. Cardiol. 77(9): 681-684. doi:10.1016/S0002-9149(97)89199-0. PMID:8651116.
    • (1996) Am. J. Cardiol , vol.77 , Issue.9 , pp. 681-684
    • Fei, L.1    Copie, X.2    Malik, M.3    Camm, A.J.4
  • 10
    • 0028046906 scopus 로고
    • Reproducibility of power spectral measures of heart rate variability obtained from short-term sampling periods
    • doi:10.1016/0002-9149(94)90604-1. PMID:7977138
    • Freed, L.A., Stein, K.M., Gordon, M., Urban, M., and Kligfield, P. 1994. Reproducibility of power spectral measures of heart rate variability obtained from short-term sampling periods. Am. J. Cardiol. 74(9): 972-973. doi:10.1016/0002-9149(94)90604-1. PMID:7977138.
    • (1994) Am. J. Cardiol , vol.74 , Issue.9 , pp. 972-973
    • Freed, L.A.1    Stein, K.M.2    Gordon, M.3    Urban, M.4    Kligfield, P.5
  • 11
    • 33845465234 scopus 로고    scopus 로고
    • Test-retest reliability of heart rate variability and respiration rate at rest and during light physical activity in normal subjects
    • doi:10.1016/j.arcmed.2006.07.009. PMID:17174734
    • Guijt, A.M., Sluiter, J.K., and Frings-Dresen, M.H.W. 2007. Test-retest reliability of heart rate variability and respiration rate at rest and during light physical activity in normal subjects. Arch. Med. Res. 38 (1): 113-120. doi:10.1016/j.arcmed.2006.07.009. PMID:17174734.
    • (2007) Arch. Med. Res , vol.38 , Issue.1 , pp. 113-120
    • Guijt, A.M.1    Sluiter, J.K.2    Frings-Dresen, M.H.W.3
  • 12
    • 1842732723 scopus 로고    scopus 로고
    • Very low frequency power of heart rate variability is a powerful predictor of clinical prognosis in patients with congestive heart failure
    • doi:10.1253/circj.68.343. PMID:15056832
    • Hadase, M., Azuma, A., Zen, K., Asada, S., Kawasaki, T., Kamitani, T., 2004. Very low frequency power of heart rate variability is a powerful predictor of clinical prognosis in patients with congestive heart failure. Circ. J. 68(4): 343-347. doi:10.1253/circj.68.343. PMID:15056832.
    • (2004) Circ. J , vol.68 , Issue.4 , pp. 343-347
    • Hadase, M.1    Azuma, A.2    Zen, K.3    Asada, S.4    Kawasaki, T.5    Kamitani, T.6
  • 13
    • 0019629207 scopus 로고
    • Respiratory sinus arrhythmia in humans: How breathing pattern modulates heart rate
    • PMID:7315987
    • Hirsch, J.A., and Bishop, B. 1981. Respiratory sinus arrhythmia in humans: how breathing pattern modulates heart rate. Am. J. Physiol. 241(4): H620-H629. PMID:7315987.
    • (1981) Am. J. Physiol , vol.241 , Issue.4
    • Hirsch, J.A.1    Bishop, B.2
  • 14
    • 0017519945 scopus 로고
    • Magnitude and phase changes in heart rate variability and blood pressure during respiratory entrainment
    • [Proceedings.] PMID:915787
    • Kitney, R.I. 1977. Magnitude and phase changes in heart rate variability and blood pressure during respiratory entrainment. J. Physiol. 270(1): 40P-41P. [Proceedings.] PMID:915787.
    • (1977) J. Physiol , vol.270 , Issue.1
    • Kitney, R.I.1
  • 15
    • 0023100673 scopus 로고
    • Decreased heart rate variability and its association with increased mortality after acute myocardial infarction
    • doi:10.1016/0002-9149(87)90795-8. PMID:3812275
    • Kleiger, R.E., Miller, J.P., Bigger, J.T., Jr, and Moss, A.J. 1987. Decreased heart rate variability and its association with increased mortality after acute myocardial infarction. Am. J. Cardiol. 59(4): 256-262. doi:10.1016/0002-9149(87)90795-8. PMID:3812275.
    • (1987) Am. J. Cardiol , vol.59 , Issue.4 , pp. 256-262
    • Kleiger, R.E.1    Miller, J.P.2    Bigger Jr., J.T.3    Moss, A.J.4
  • 16
    • 0347125108 scopus 로고    scopus 로고
    • Short- and long-term reproducibility of autonomic measures in supine and standing positions
    • doi:10.1042/CS20030119. PMID:12889989
    • Kowalewski, M.A., and Urban, M. 2004. Short- and long-term reproducibility of autonomic measures in supine and standing positions. Clin. Sci. (Lond.), 106(1): 61-66. doi:10.1042/CS20030119. PMID:12889989.
    • (2004) Clin. Sci. (Lond.) , vol.106 , Issue.1 , pp. 61-66
    • Kowalewski, M.A.1    Urban, M.2
  • 17
    • 52949148607 scopus 로고    scopus 로고
    • Moderate-term reproducibility of heart rate variability during rest and light to moderate exercise in children
    • doi:10.1590/S0100-879X2008000700013. PMID:18719745
    • Leicht, A.S., and Allen, G.D. 2008. Moderate-term reproducibility of heart rate variability during rest and light to moderate exercise in children. Braz. J. Med. Biol. Res. 41(7): 627-633. doi:10.1590/S0100-879X2008000700013. PMID:18719745.
    • (2008) Braz. J. Med. Biol. Res , vol.41 , Issue.7 , pp. 627-633
    • Leicht, A.S.1    Allen, G.D.2
  • 18
    • 0037850083 scopus 로고    scopus 로고
    • Heart rate variability and endogenous sex hormones during the menstrual cycle in young women
    • doi:10.1113/eph8802535. PMID:12719769
    • Leicht, A.S., Hirning, D.A., and Allen, G.D. 2003a. Heart rate variability and endogenous sex hormones during the menstrual cycle in young women. Exp. Physiol. 88(3): 441-446. doi:10.1113/eph8802535. PMID:12719769.
    • (2003) Exp. Physiol , vol.88 , Issue.3 , pp. 441-446
    • Leicht, A.S.1    Hirning, D.A.2    Allen, G.D.3
  • 19
    • 0347623035 scopus 로고    scopus 로고
    • Influence of intensive cycling training on heart rate variability during rest and exercise
    • MID:14992127
    • Leicht, A.S., Allen, G.D., and Hoey, A.J. 2003b. Influence of intensive cycling training on heart rate variability during rest and exercise. Can. J. Appl. Physiol. 28(6): 898-909. MID:14992127.
    • (2003) Can. J. Appl. Physiol , vol.28 , Issue.6 , pp. 898-909
    • Leicht, A.S.1    Allen, G.D.2    Hoey, A.J.3
  • 20
    • 0033174533 scopus 로고    scopus 로고
    • Reproducibility of resting heart rate variability with short sampling periods
    • PMID:10470450
    • Marks, B.L., and Lightfoot, J.T. 1999. Reproducibility of resting heart rate variability with short sampling periods. Can. J. Appl. Physiol. 24(4): 337-348. PMID:10470450.
    • (1999) Can. J. Appl. Physiol , vol.24 , Issue.4 , pp. 337-348
    • Marks, B.L.1    Lightfoot, J.T.2
  • 21
    • 0029055693 scopus 로고
    • Voluntary control of breathing does not alter vagal modulation of heart rate
    • PMID:7665403
    • Patwardhan, A.R., Evans, J.M., Bruce, E.N., Eckberg, D.L., and Knapp, C.F. 1995. Voluntary control of breathing does not alter vagal modulation of heart rate. J. Appl. Physiol. 78(6): 2087-2094. PMID:7665403.
    • (1995) J. Appl. Physiol , vol.78 , Issue.6 , pp. 2087-2094
    • Patwardhan, A.R.1    Evans, J.M.2    Bruce, E.N.3    Eckberg, D.L.4    Knapp, C.F.5
  • 23
    • 0021912061 scopus 로고
    • Assessment of autonomic function in humans by heart rate spectral analysis
    • PMID:3970172
    • Pomeranz, B., Macaulay, R.J., Caudill, M.A., Kutz, I., Adam, D., Gordon, D., 1985. Assessment of autonomic function in humans by heart rate spectral analysis. Am. J. Physiol. 248(1 Pt. 2): H151-H153. PMID:3970172.
    • (1985) Am. J. Physiol , vol.248 , Issue.1 Pt. 2
    • Pomeranz, B.1    Macaulay, R.J.2    Caudill, M.A.3    Kutz, I.4    Adam, D.5    Gordon, D.6
  • 24
    • 0030585690 scopus 로고    scopus 로고
    • Detection and significance of a discrete very low frequency rhythm in RR interval variability in chronic congestive heart failure
    • doi:10.1016/S0002-9149(96)00199-3. PMID:8677873
    • Ponikowski, P., Chua, T.P., Amadi, A.A., Piepoli, M., Harrington, D., Volterrani, M., 1996. Detection and significance of a discrete very low frequency rhythm in RR interval variability in chronic congestive heart failure. Am. J. Cardiol. 77(15): 1320-1326. doi:10.1016/S0002-9149(96)00199-3. PMID:8677873.
    • (1996) Am. J. Cardiol , vol.77 , Issue.15 , pp. 1320-1326
    • Ponikowski, P.1    Chua, T.P.2    Amadi, A.A.3    Piepoli, M.4    Harrington, D.5    Volterrani, M.6
  • 25
    • 0031563510 scopus 로고    scopus 로고
    • Reflex control of autonomic function induced by posture change during the menstrual cycle
    • doi:10.1016/S0165-1838(97)00067-2. PMID:9334995
    • Saeki, Y., Atogami, F., Takahashi, K., and Yoshizawa, T. 1997. Reflex control of autonomic function induced by posture change during the menstrual cycle. J. Auton. Nerv. Syst. 66(1-2): 69-74. doi:10.1016/S0165-1838(97)00067-2. PMID:9334995.
    • (1997) J. Auton. Nerv. Syst , vol.66 , Issue.1-2 , pp. 69-74
    • Saeki, Y.1    Atogami, F.2    Takahashi, K.3    Yoshizawa, T.4
  • 26
    • 8844254721 scopus 로고    scopus 로고
    • Reliability of three commercially available heart rate variability instruments using short-term (5-min) recordings
    • doi:10.1111/j.1475-097X.2004.00584.x. PMID:15522045
    • Sandercock, G.R., Bromley, P., and Brodie, D.A. 2004. Reliability of three commercially available heart rate variability instruments using short-term (5-min) recordings. Clin. Physiol. Funct. Imaging, 24(6): 359-367. doi:10.1111/j.1475-097X.2004.00584.x. PMID:15522045.
    • (2004) Clin. Physiol. Funct. Imaging , vol.24 , Issue.6 , pp. 359-367
    • Sandercock, G.R.1    Bromley, P.2    Brodie, D.A.3
  • 27
    • 23644456381 scopus 로고    scopus 로고
    • The reliability of short-termmeasurements of heart rate variability
    • doi:10.1016/j.ijcard.2004.09.013. PMID:16098384
    • Sandercock, G.R., Bromley, P.D., and Brodie, D.A. 2005. The reliability of short-termmeasurements of heart rate variability. Int. J.Cardiol. 103 (3): 238-247. doi:10.1016/j.ijcard.2004.09.013. PMID:16098384.
    • (2005) Int. J.Cardiol , vol.103 , Issue.3 , pp. 238-247
    • Sandercock, G.R.1    Bromley, P.D.2    Brodie, D.A.3
  • 28
    • 0029157021 scopus 로고
    • Power spectral analysis of heart rate variability in healthy young women during the normal menstrual cycle
    • PMID:7480562
    • Sato, N., Miyake, S., Akatsu, J., and Kumashiro, M. 1995. Power spectral analysis of heart rate variability in healthy young women during the normal menstrual cycle. Psychosom. Med. 57(4): 331-335. PMID:7480562.
    • (1995) Psychosom. Med , vol.57 , Issue.4 , pp. 331-335
    • Sato, N.1    Miyake, S.2    Akatsu, J.3    Kumashiro, M.4
  • 29
    • 0031844674 scopus 로고    scopus 로고
    • Five minute recordings of heart rate variability for population studies: Repeatability and age-sex characteristics
    • PMID:9813562
    • Sinnreich, R., Kark, J.D., Friedlander, Y., Sapoznikov, D., and Luria, M.H. 1998. Five minute recordings of heart rate variability for population studies: repeatability and age-sex characteristics. Heart, 80(2): 156-162. PMID:9813562.
    • (1998) Heart , vol.80 , Issue.2 , pp. 156-162
    • Sinnreich, R.1    Kark, J.D.2    Friedlander, Y.3    Sapoznikov, D.4    Luria, M.H.5
  • 30
    • 29144521680 scopus 로고    scopus 로고
    • Stability over time of short-term heart rate variability
    • doi:10.1007/s10286-005-0302-7. PMID:16362542
    • Tarkiainen, T.H., Timonen, K.L., Tiittanen, P., Hartikainen, J.E., Pekkanen, J., Hoek, G., 2005. Stability over time of short-term heart rate variability. Clin. Auton. Res. 15(6): 394-399. doi:10.1007/s10286-005-0302-7. PMID:16362542.
    • (2005) Clin. Auton. Res , vol.15 , Issue.6 , pp. 394-399
    • Tarkiainen, T.H.1    Timonen, K.L.2    Tiittanen, P.3    Hartikainen, J.E.4    Pekkanen, J.5    Hoek, G.6
  • 31
    • 0029928495 scopus 로고    scopus 로고
    • Heart rate variability: Standards of measurement, physiological interpretation and clinical use
    • Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology, PMID:8598068
    • Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology. 1996. Heart rate variability: Standards of measurement, physiological interpretation and clinical use. Circulation, 93(5): 1043-1065. PMID:8598068.
    • (1996) Circulation , vol.93 , Issue.5 , pp. 1043-1065
  • 32
    • 0032508373 scopus 로고    scopus 로고
    • Mechanisms underlying very-low-frequency RR-interval oscillations in humans
    • PMID:9714112
    • Taylor, J.A., Carr, D.L., Myers, C.W., and Eckberg, D.L. 1998. Mechanisms underlying very-low-frequency RR-interval oscillations in humans. Circulation, 98(6): 547-555. PMID:9714112.
    • (1998) Circulation , vol.98 , Issue.6 , pp. 547-555
    • Taylor, J.A.1    Carr, D.L.2    Myers, C.W.3    Eckberg, D.L.4
  • 33
    • 0027955938 scopus 로고
    • Reduced heart rate variability and mortality risk in an elderly cohort. The Framingham Heart Study
    • PMID:8044959
    • Tsuji, H., Venditti, F.J., Jr, Manders, E.S., Evans, J.C., Larson, M.G., Feldman, C.L., and Levy, D. 1994. Reduced heart rate variability and mortality risk in an elderly cohort. The Framingham Heart Study. Circulation, 90(2): 878-883. PMID:8044959.
    • (1994) Circulation , vol.90 , Issue.2 , pp. 878-883
    • Tsuji, H.1    Venditti Jr., F.J.2    Manders, E.S.3    Evans, J.C.4    Larson, M.G.5    Feldman, C.L.6    Levy, D.7
  • 34
    • 0031913381 scopus 로고    scopus 로고
    • Vagal modulation of heart rate during exercise: Effects of age and physical fitness
    • PMID:9486244
    • Tulppo, M.P., Makikallio, T.H., Seppanen, T., Laukkanen, R.T., and Huikuri, H.V. 1998. Vagal modulation of heart rate during exercise: effects of age and physical fitness. Am. J. Physiol. 274(2 Pt. 2): H424-H429. PMID:9486244.
    • (1998) Am. J. Physiol , vol.274 , Issue.2 Pt. 2
    • Tulppo, M.P.1    Makikallio, T.H.2    Seppanen, T.3    Laukkanen, R.T.4    Huikuri, H.V.5
  • 35
    • 0026315806 scopus 로고
    • Reproducibility and relation to mean heart rate of heart rate variability in normal subjects and in patients with congestive heart failure secondary to coronary artery disease
    • doi:10.1016/0002-9149(91)90327-H. PMID:1746470
    • Van Hoogenhuyze, D., Weinstein, N., Martin, G.J., Weiss, J.S., Schaad, J.W., Sahyouni, X.N., 1991. Reproducibility and relation to mean heart rate of heart rate variability in normal subjects and in patients with congestive heart failure secondary to coronary artery disease. Am. J. Cardiol. 68(17): 1668-1676. doi:10.1016/0002-9149(91)90327-H. PMID:1746470.
    • (1991) Am. J. Cardiol , vol.68 , Issue.17 , pp. 1668-1676
    • van Hoogenhuyze, D.1    Weinstein, N.2    Martin, G.J.3    Weiss, J.S.4    Schaad, J.W.5    Sahyouni, X.N.6
  • 36
    • 0025822772 scopus 로고
    • Autonomic control of heart rate during exercise studied by heart rate variability spectral analysis
    • PMID:1757310
    • Yamamoto, Y., Hughson, R.L., and Peterson, J.C. 1991. Autonomic control of heart rate during exercise studied by heart rate variability spectral analysis. J.Appl. Physiol. 71(3): 1136-1142. PMID:1757310.
    • (1991) J.Appl. Physiol , vol.71 , Issue.3 , pp. 1136-1142
    • Yamamoto, Y.1    Hughson, R.L.2    Peterson, J.C.3
  • 37
    • 34250689902 scopus 로고    scopus 로고
    • Respiratory effects on the reproducibility of cardiovascular autonomic parameters
    • doi:10.1111/j.1475-097X.2007.00736.x. PMID:17564668
    • Zöllei, E., Csillik, A., Rabi, S., Gingl, Z., and Rudas, L. 2007. Respiratory effects on the reproducibility of cardiovascular autonomic parameters. Clin. Physiol. Funct. Imaging, 27(4): 205-210. doi:10.1111/j.1475-097X.2007.00736.x. PMID:17564668.
    • (2007) Clin. Physiol. Funct. Imaging , vol.27 , Issue.4 , pp. 205-210
    • Zöllei, E.1    Csillik, A.2    Rabi, S.3    Gingl, Z.4    Rudas, L.5


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