E. Valletta, M. Fornaro, D. Schena, C. Colato, A. Zaccaron, and F. Camoglio, “Langerhans cell histiocytosis in a child with a perianal skin lesion and constipation.”, Eur. J. Pediat. Dermatol., vol. 18, no. 2, pp. 70-71, Jun. 2008.