RT Journal
T1 QUestions and answers
JF Journal of the American Medical Association
JO Journal of the American Medical Association
YR 1959
FD October 31
VO 171
IS 9
SP 1273
OP 1276
DO 10.1001/jama.1959.03010270109034
UL http://dx.doi.org/10.1001/jama.1959.03010270109034
AB