RT Journal
T1 QUestions and answers
JF Journal of the American Medical Association
JO Journal of the American Medical Association
YR 1959
FD March 28
VO 169
IS 13
SP 1539
OP 1548
DO 10.1001/jama.1959.03000300135029
UL http://dx.doi.org/10.1001/jama.1959.03000300135029
AB