GELFAND, DAVID W. M.D.; GOLDMAN, ARMOND S. M.D.; LAW, EDWARD J. M.D.; MACMILLAN, BRUCE G. M.D.; LARSON, DUANE M.D.; ABSTON, SALLY M.D.; SCHREIBER, J. TRACY M.D. Author Information
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Gelfand et al. (1972) studied this question.