RT Journal
T1 QUestions and answers
JF Journal of the American Medical Association
JO Journal of the American Medical Association
YR 1959
FD May 9
VO 170
IS 2
SP 254
OP 256
DO 10.1001/jama.1959.03010020112032
UL http://dx.doi.org/10.1001/jama.1959.03010020112032
AB