Full text
PDF
. 1935 Mar;7(2):141–146.
Dr. Charles Caldwell
1Lexington, Ky.
This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License, which permits non-commercial use and redistribution provided that the original author and source are credited.
PMCID: PMC7942314 PMID: 33943635
