RT Journal T1 QUeries and minor notes JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1939 FD June 3 VO 112 IS 22 SP 2347 OP 2353 DO 10.1001/jama.1939.02800220113027 UL http://dx.doi.org/10.1001/jama.1939.02800220113027 AB