TY - JOUR T1 - QUestions and answers Y1 - 1959/08/08 N1 - 10.1001/jama.1959.03010150121036 JO - Journal of the American Medical Association SP - 1877 EP - 1884 VL - 170 IS - 15 N2 - SN - 0002-9955 M3 - doi: 10.1001/jama.1959.03010150121036 UR - http://dx.doi.org/10.1001/jama.1959.03010150121036 ER -