TI - MEdical news PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {1337-1340}, VI - 113 IP - 14 AID - 10.1001/jama.1939.02800390059020 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800390059020 SO - Journal of the American Medical Association September 30, 1939 113(14):1337