Valletta, E., M. Fornaro, D. Schena, C. Colato, A. Zaccaron, and F.S. Camoglio. 2008. “Langerhans Cell Histiocytosis in a Child With a Perianal Skin Lesion and Constipation.”. European Journal of Pediatric Dermatology 18 (2):70-71. https://www.ejpd.com/index.php/journal/article/view/505.