Wutte, Nora, Andrea Berghold, Krainberger Ingrid, and Elisabeth Aberer. 2011. “Immunohistochemical Features of Merkel Cell Carcinoma in Correlation With Presence of Merkel Cell Polyomavirus DNA”. Acta Dermato-Venereologica 91 (6):724-25. https://doi.org/10.2340/00015555-1144.