TI - MEdical news PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {1742-1745}, VI - 113 IP - 19 AID - 10.1001/jama.1939.02800440046018 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800440046018 SO - Journal of the American Medical Association November 4, 1939 113(19):1742