Director (Dr. Dickinson) and Staff Associate (Mr. Raymond), Bureau of Medical Economic Research, American Medical Association.
Regina Evans Holloman, research assistant, assisted in the preparation of the tables.
Because of space limitations the appendix has been omitted and will appear in the Bureau's reprints.
BUREAU OF MEDICAL ECONOMIC RESEARCH. JAMA. 1955;159(2):119-127. doi:10.1001/jama.1955.02960190025011