Farooqi, Sadaf, and William J Salyers. “Crohn’s Disease With Pyoderma Gangrenosum: A Sign of Severity of Disease”.
Kansas Journal of Medicine
6, no. 2 (May 28, 2013): 76–79. Accessed April 17, 2025.
https://journals.ku.edu/kjm/article/view/11443
.