An open-label, multicohort Phase Ib trial of pembrolizumab (MK-3475) for advanced hematologic malignancies: KEYNOTE-013. (4th November 2015) - Ribrag, Vincent; Armand, Phillippe; Kuruvilla, John; Michot, Jean-Marie; Moskowitz, Craig H; Marinello, Patricia; Snyder, Ellen; Balakumaran, Arun; Shipp, Margaret A; Zinzani, Pier Luigi