Yeager, H., and S. Gopalan. “John S. Chapman,MD: Neglected Pioneer in Sarcoidosis”.
Sarcoidosis, Vasculitis and Diffuse Lung Diseases
, vol. 29, no. 1, June 2012, pp. 74-76,
https://mattioli1885journals.com/index.php/sarcoidosis/article/view/2526
.