RT Journal
T1 QUestions and answers
JF Journal of the American Medical Association
JO Journal of the American Medical Association
YR 1959
FD December 12
VO 171
IS 15
SP 2152
OP 2156
DO 10.1001/jama.1959.03010330114032
UL http://dx.doi.org/10.1001/jama.1959.03010330114032
AB