An open-label, multicohort Phase Ib trial of pembrolizumab (MK-3475) for advanced hematologic malignancies: KEYNOTE-013. Issue 2 (December 2015) - Ribrag, Vincent; Armand, Phillippe; Kuruvilla, John; Michot, Jean-Marie; Moskowitz, Craig; Marinello, Patricia; Snyder, Ellen; Balakumaran, Arun; Shipp, Margaret; Zinzani, Pier