TI - MEdical news PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {1138-1142}, VI - 113 IP - 12 AID - 10.1001/jama.1939.02800370054019 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800370054019 SO - Journal of the American Medical Association September 16, 1939 113(12):1138