TI - QUestions and answers PT - JOUR DP - 1959 TA - Journal of the American Medical Association pages = {1273-1276}, VI - 171 IP - 9 AID - 10.1001/jama.1959.03010270109034 [doi] 4100 - http://dx.doi.org/10.1001/jama.1959.03010270109034 SO - Journal of the American Medical Association October 31, 1959 171(9):1273