TI - MEdical news PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {1513-1518}, VI - 112 IP - 15 AID - 10.1001/jama.1939.02800150085016 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800150085016 SO - Journal of the American Medical Association April 15, 1939 112(15):1513