TI - CUrrent comment PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {1159-1160}, VI - 112 IP - 12 AID - 10.1001/jama.1939.02800120045015 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800120045015 SO - Journal of the American Medical Association March 25, 1939 112(12):1159