Safety and antitumor activity of the anti-PD-1 antibody pembrolizumab in patients with recurrent carcinoma of the anal canal

Ott, Pa; Piha-Paul, Sa; Munster, P; Pishvaian, Mj; van Brummelen, Em; Cohen, Rb; Gomez-Roca, C; Ejadi, S; Stein, M; Chan, E; Simonelli, M; Morosky, A; Saraf, S; Emancipator, K; Koshiji, M; Bennouna, J.