@misc{yin_guo_duan_huang, 
  title={Role of PD-1/PD-L1 inhibitors in the treatment of recurrent/metastatic head and neck squamous cell carcinoma: a systematic review and meta-analysis}, 
  DOI={10.22541/au.158817485.52042077}, 
  publisher={Authorea, Inc.}, 
  author={Yin, gaofei and Guo, Wei and Duan, Hanyuan and Huang, zhigang}
  }