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Wagenknecht LE, Mayer EJ, Rewers M, Haffner S, Selby J, Borok GM, Henkin L, Howard G, Savage PJ, Saad MF, et al.Wagenknecht LE, et al. Among authors: mayer ej.Ann Epidemiol. 1995 Nov;5(6):464-72. doi: 10.1016/1047-2797(95)00062-3.Ann Epidemiol. 1995.PMID: 8680609