TI - BRazil PT - JOUR DP - 1959 TA - Journal of the American Medical Association pages = {2121-2122}, VI - 170 IP - 17 AID - 10.1001/jama.1959.63010170019019 [doi] 4100 - http://dx.doi.org/10.1001/jama.1959.63010170019019 SO - Journal of the American Medical Association August 22, 1959 170(17):2121