“Vitamin D Supplementation to Prevent Redevelopment of Basal Cell Carcinoma (BCC): A Phase III Randomized Clinical Trial Protocol”. Principles and Practice of Clinical Research 5, no. 1 (July 5, 2019): 30–35. Accessed December 3, 2024. https://journal.ppcr.org/index.php/ppcrjournal/article/view/73.