A Severe, Refractory Case of Mucous Membrane Pemphigoid After Treatment With Pembrolizumab: Brief Communication - Bezinelli, Letícia Mello; Eduardo, Fernanda P; Migliorati, Cesar A; Ferreira, Mariana H; Taranto, Patricia; Sales, Diogo B; Santi, Claudia G; Macarenco, Ricardo Silvestre e Silva; Godoy, Claudia P.V; Corrêa, Luciana; Buzaid, Antonio C (Journal of Immunotherapy, 2019)