RT Journal T1 PHarmacology JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1909 FD May 22 VO LII IS 21 SP 1678 OP 1678 DO 10.1001/jama.1909.02540470044010 UL http://dx.doi.org/10.1001/jama.1909.02540470044010 AB