Zinzani, P.L. Chen, R. Armand, P. Johnson, N.A. Brice, P. Radford, J. Ribrag, V. Molin, D. Vassilakopoulos, T.P. Tomita, A. von Tresckow, B. Shipp, M.A. Lin, J. Nahar, A. Balakumaran, A. Moskowitz, C.H., Pembrolizumab monotherapy in patients with primary refractory classical hodgkin lymphoma who relapsed after salvage autologous stem cell transplantation and/or brentuximab vedotin therapy: KEYNOTE-087 subgroup analysis, Clinical Lymphoma Myeloma and Leukemia, (61), 950-954, 2020, Taylor and Francis Ltd.,