Regression of Multiple Melanocytic Nevi in Two Patients on Nivolumab for Metastatic Melanoma - Gloria Baeza-Hernández; Ricardo Francisco Rubio-Aguilera; Anastasia Alejandra Garrido-Ríos; Helena Álvarez-Garrido; Cristina Martínez-Morán; Jesús Borbujo (Mattioli1885, 2023)