Merkel cell carcinoma in collision with squamous cell carcinoma and basal cell carcinoma in a patient on ruxolitinib treatment for myeloproliferative neoplasm - Viviana Barrera-Penagos, MD; Daniela Castellanos-Leguizamón, BS; José Antonio Hakim-Tawil, MD; Juan José Santivañez, MD; Paula A. Rodríguez-Urrego, MD; Juan Carlos Hiromi López-Takegami, MD (Elsevier, 2024)