TI - CUrrent comment PT - JOUR DP - 1949 TA - Journal of the American Medical Association pages = {853}, VI - 139 IP - 13 AID - 10.1001/jama.1949.02900300039017 [doi] 4100 - http://dx.doi.org/10.1001/jama.1949.02900300039017 SO - Journal of the American Medical Association March 26, 1949 139(13):853