TI - CUrrent comment PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {236}, VI - 113 IP - 3 AID - 10.1001/jama.1939.02800280048014 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800280048014 SO - Journal of the American Medical Association July 15, 1939 113(3):236