TI - MEdical news PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {1734-1737}, VI - 112 IP - 17 AID - 10.1001/jama.1939.02800170080020 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800170080020 SO - Journal of the American Medical Association April 29, 1939 112(17):1734