TI - MEdical news PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {429-432}, VI - 113 IP - 5 AID - 10.1001/jama.1939.02800300059018 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800300059018 SO - Journal of the American Medical Association July 29, 1939 113(5):429