RT Journal T1 MEdical literature abstracts JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1959 FD October 24 VO 171 IS 8 SP 1148 OP 1159 DO 10.1001/jama.1959.03010260104025 UL http://dx.doi.org/10.1001/jama.1959.03010260104025 AB