RT Journal
T1 QUestions and answers
JF Journal of the American Medical Association
JO Journal of the American Medical Association
YR 1959
FD August 8
VO 170
IS 15
SP 1877
OP 1884
DO 10.1001/jama.1959.03010150121036
UL http://dx.doi.org/10.1001/jama.1959.03010150121036
AB