TI - MEdical news PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {949-952}, VI - 113 IP - 10 AID - 10.1001/jama.1939.02800350059020 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800350059020 SO - Journal of the American Medical Association September 2, 1939 113(10):949