Ruiz-Villaverde, Ricardo, and Daniel Sánchez-Cano. “Multiple Pyoderma Gangrenosum Ulcers Associated With Cocaine Abuse”. Sultan Qaboos University Medical Journal 16, no. 4 (November 1, 2016): 527–528. Accessed May 4, 2024. https://journals.squ.edu.om/index.php/squmj/article/view/2200.