TI - LOndon PT - JOUR DP - 1929 TA - Journal of the American Medical Association pages = {857-858}, VI - 93 IP - 11 AID - 10.1001/jama.1929.02710110043017 [doi] 4100 - http://dx.doi.org/10.1001/jama.1929.02710110043017 SO - Journal of the American Medical Association September 14, 1929 93(11):857