Download the full article as a PDF Diehl HS, Baker AB, Cowan DW (1938). JAMA 111(13):1168-1173. [Select the PDF link in the article tool box in the upper right corner]
The James Lind Library is grateful to:
JAMA for making a toll free link to the pdf of this article available (email to Iain Chalmers from Annette Flanagin, 29 August 2014).