RT Journal T1 PHarmacology JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1909 FD February 6 VO LII IS 6 SP 488 OP 489 DO 10.1001/jama.1909.02540320060012 UL http://dx.doi.org/10.1001/jama.1909.02540320060012 AB