Giannopoulos, Filippos, et al. “Methotrexate Use for Patients With Psoriasis and Risk of Cutaneous Squamous Cell Carcinoma: A Nested Case-Control Study”. Acta Dermato-Venereologica, vol. 101, no. 1, Jan. 2021, p. adv00365, doi:10.2340/00015555-3725.