TI - MEdical news PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {249-253}, VI - 112 IP - 3 AID - 10.1001/jama.1939.02800030059017 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800030059017 SO - Journal of the American Medical Association January 21, 1939 112(3):249