Use of PD-1 blockade in refractory/relapsed natural killer T-cell lymphomas: a systematic review and synthesis of case reports. - Rivera-Francia, Victor M; Failoc-Rojas, Virgilio E.; Villacorta-Carranza, Robert; Leon Garrido-Lecca, Alejandro; Calle-Villavicencio, Ana; Torres-Mera, Alicia; Valladares-Garido, Mario J.; Huerta-Collado, Yesenia; Motta-Guerrero, Rodrigo; Casanova Marquez, Luis (Leukemia & Lymphoma, 2024)