Pembrolizumab in relapsed or refractory Hodgkin lymphoma: 2-year follow-up of KEYNOTE-087

Robert Chen, Pier Luigi Zinzani, Hun Ju Lee, Philippe Armand, Nathalie A. Johnson, Pauline Brice, John Radford, Vincent Ribrag, Daniel Molin, Theodoros P. Vassilakopoulos, Akihiro Tomita, Bastian von Tresckow, Margaret A. Shipp, Jianxin Lin, Eunhee Kim, Akash Nahar, Arun Balakumaran, Craig H. Moskowitz