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Manning JT, Scutt D, Wilson J, Lewis-Jones DI. The ratio of 2nd to 4th digit length: a predictor of sperm numbers and concentrations of testosterone, luteinizing hormone and estrogen. Hum Reprod 1998;13:3000-3004.
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Manning JT, Barley L, Walton J, Lewis-Johns DI, Trivers RL, Singh D, et al. The 2nd:4th digit ratio, sexual dimorphism, population differences and reproductive success. Evidence for sexual antagonistic gene? Evol Human Behav 2000;21:163-183.
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Manning JT, Stewart A, Bundred PE, Trivers RL. Sex and ethnic differences in 2nd to 4th digit ratio of children. Early Hum Dev 2004;80:161-168.
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Manning JT. Digit ratio: a pointer to fertility, behavior, and health. 1st ed. New Jersey: Rutgers U Press;2002. p. 1-140.
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Malas MA, Dogan S, Evcil EH, Desdicioglu K. Fetal development of the hand, digits and digit ratio(2D:4D). Early Hum Dev 2006;82:469-475.
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Manning JT. The ratio of 2nd to 4th digit length and performance in skiing. J Sports Med Physical Fitness 2002;42:446-450.
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Manning JT, Trivers RL, Singh D, Thornhill R. The mystery of female beauty. Nature 1999;399:214-215.
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Manning JT, Trivers RL, Thornhill R, Singh D. The 2nd:4th digit ratio and asymmetry of hand performance in Jamaican children. Laterality 2000;5:121-132.
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Okten A, Kalyoncu M, Yaris¸ N. The ratio of secondand fourth-digit lengths and congenital adrenal hyperplasia due to 21-hydroxylase deficiency. Early Hum Dev 2002;70:47-54.
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Halpern DF. Sex differences in cognitive abilities. 1st ed. London: Lawrence Erlbaum Associates;1992. p.93-97.
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Trivers RL, Manning JT, Thornhill R, Singh D, McGuire M. The Jamaican Symmetry Project: long-term study of fluctuating asymmetry in rural Jamaican children. Hum Biol 1999;71:417-430.
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Manning JT, Taylor RP. Second to forth digit ratio and male ability in sport: implications for sexual selection in humans. Evol Hum Behav 2001;22:61-69.
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Bailey AA, Hurd PL. Finger length ratio(2D:4D) correlates with physical aggression in men but not in woman. Biol Psychol 2005;68:215-222.
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Coates JM, Gurnell M, Rustichini A. Second-to-fourth digit predicts success among high-frequency financial traders. Proc Natl Acad Sci U S A 2009;106:623-628.
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Silva JM. The perceived legitimacy of rule violating behavior in sport. J Sport Psychol 1983;5:438-448.
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Keeler LA. The differences in sport aggression, life aggression, and life assertion among adult male and female collision contact, and non-contact sport athletes. J Sport Behavior 2007;30:57-76.
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Manning JT, Churchill AJ, Peters M. The effects of sex, ethnicity, and sexual orientation on self-measured digit ratio(2D:4D). Arch Sex Behav 2007;36:223-233.
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Choi KH, Kwon SO. Sex differences in ratio of the lengths of the second to fourth digits(2D:4D). Korean J Growth Dev 2007;15:155-159.
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Honekopp J, T Manning JT, Muller C. Digit ratio(2D:4D) and physical fitness in male and female: Evidence for effects of prenatal androgens on sexually selected traits. Horm Behav 2006;49:545-549.
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Paul SN, Kato BS, Hulkin JL, Vivekanandan S, Spector TD. The big finger: the second to fourth digit ratio is a predictor of sporting ability in women. Br J Sports Med 2006;40:981-983.
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Manning JT, Henzi P, Venkatramana P, Martin S, Singh D. Second to fourth digit ratio: ethnic differences and family size in English, Indian and South African populations. Ann Hum Biol 2003;30:579-588.
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Roney JR, Maestripieri D. Relative digit lengths predict men's behavior and attractiveness during social interactions with women. Hum Nat 2004;15:271-282.
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Lippa RA. Finger lengths, 2D:4D ratios, and their relation to gender-related personality traits and the Big Five. Biol Psychol 2006;71:116-121.
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Fink B, Manning JT, Neave N. Second to fourth digit ratio and the 'big five' personality factors. Personality Indiv Differences 2004;37:495-503
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Choi KH, Kim JW. Second-to-fourth digit ratio related to sexual dimorphism. J Korean Coaching Dev 2006;8:31-38.
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McFadden D, Shubel E. Relative lengths of fingers and toes in human males and females. Horm Behav 2002;42:492-500.
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Baron-Cohen S. The extreme male brain theory of autism. Trends Cogn Sci 2002;6:248-254.
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Evardon M, Alexander GM. Anxiety, sex-linked behaviors and digit ratios(2D:4D). Arch Sex Behav 2009;38:442-455.
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Manning JT, Baron-Cohen S, Wheelwright S, Sanders G. The 2nd to 4th digit ratio and autism. Devl Med Child Neurol 2001;43:160-164.
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Cho HW, Chae JH, Lee YS. The differences of 2nd and to 4th digit length ratio between schizophrenia patients and normal controls. J Korean Neuropsychiatr Assoc 2009;48:496-501.
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