L. Negosanti, R. Sgarzani, M. Santoli, M. Negosanti, N. Banzola, and F. Negosanti, “Severe local skin reaction after the application of ingenol mebutate gel treated by photodynamic therapy: A case report”, J Surg Dermatol, vol. 3, no. 1, pp. 3-5, Oct. 2017.