RT Journal T1 CUrrent comment JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1929 FD October 26 VO 93 IS 17 SP 1312 OP 1313 DO 10.1001/jama.1929.02710170044014 UL http://dx.doi.org/10.1001/jama.1929.02710170044014 AB