de Giorgi, Vincenzo, Silvia Benemei, Marta Grazzini, Torello Lotti, and Pierangelo Geppetti. “Rapid Growth of Merkel Cell Carcinoma During Etanercept Treatment of Psoriatic Arthritis: Cause or Coincidence?”. Acta Dermato-Venereologica 91, no. 3 (February 23, 2011): 354–355. Accessed February 23, 2025. https://medicaljournalssweden.se/actadv/article/view/9066.