TI - MEdical literature abstracts PT - JOUR DP - 1959 TA - Journal of the American Medical Association pages = {628-631}, VI - 170 IP - 5 AID - 10.1001/jama.1959.03010050122022 [doi] 4100 - http://dx.doi.org/10.1001/jama.1959.03010050122022 SO - Journal of the American Medical Association May 30, 1959 170(5):628