The prognostic role of PD-L1 expression for survival in head and neck squamous cell carcinoma: A systematic review and meta-analysis

Oral Oncology ◽  
2018 ◽  
Vol 86 ◽  
pp. 81-90 ◽  
Author(s):  
Wei-fa Yang ◽  
May C.M. Wong ◽  
Peter J. Thomson ◽  
Kar-Yan Li ◽  
Yu-xiong Su
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