title: [PD-1 expression on the surface of peripheral blood CD4+T cell and its association with the prognosis of patients with peripheral T/NK cell lymphoma].
authors: Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
authors: J F
authors: JF
authors: Bai
authors: M X
authors: MX
authors: Zuo
authors: Y
authors: Y
authors: Zhang
authors: J
authors: J
authors: Feng
authors: X
authors: X
authors: Han
authors: D B
authors: DB
authors: Zhou
authors: W
authors: W
authors: Zhang