RT Journal T1 PHarmacology JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1909 FD March 13 VO LII IS 11 SP 903 OP 904 DO 10.1001/jama.1909.02540370061014 UL http://dx.doi.org/10.1001/jama.1909.02540370061014 AB