Pinho, A., B. Aguiar, M. M. Brites, R. Vieira, R. Alves, and A. Figueiredo. “Sirolimus and Primary Prevention of Non-Melanoma Skin Cancer in Kidney Transplant Recipients – A Retrospective Study”. Journal of the Portuguese Society of Dermatology and Venereology, Vol. 74, no. 2, Aug. 2016, pp. 153-9, doi:10.29021/spdv.74.2.551.