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Kraakman EM, Bontrop RE, Groenestein R, Jonker M, Haaijman JJ, t Hart BA.Kraakman EM, et al.J Med Primatol. 1995 Dec;24(4):306-12. doi: 10.1111/j.1600-0684.1995.tb00183.x.J Med Primatol. 1995.PMID: 8750506