TI - MEdical news PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {2067-2071}, VI - 113 IP - 23 AID - 10.1001/jama.1939.02800480049016 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800480049016 SO - Journal of the American Medical Association December 2, 1939 113(23):2067