TI - QUestions and answers PT - JOUR DP - 1959 TA - Journal of the American Medical Association pages = {1014-1018}, VI - 169 IP - 9 AID - 10.1001/jama.1959.03000260112040 [doi] 4100 - http://dx.doi.org/10.1001/jama.1959.03000260112040 SO - Journal of the American Medical Association February 28, 1959 169(9):1014