TI - BRazil PT - JOUR DP - 1959 TA - Journal of the American Medical Association pages = {1723}, VI - 171 IP - 12 AID - 10.1001/jama.1959.73010300018024 [doi] 4100 - http://dx.doi.org/10.1001/jama.1959.73010300018024 SO - Journal of the American Medical Association November 21, 1959 171(12):1723