RT Journal
T1 QUestions and answers
JF Journal of the American Medical Association
JO Journal of the American Medical Association
YR 1959
FD June 6
VO 170
IS 6
SP 757
OP 760
DO 10.1001/jama.1959.03010060125040
UL http://dx.doi.org/10.1001/jama.1959.03010060125040
AB