Reviewer_1_v.2 – Supplemental material for Association between tumor necrosis factor-α and chronic obstructive pulmonary disease: a systematic review and meta-analysis

Supplemental material, Reviewer_1_v.2 for Association between tumor necrosis factor-α and chronic obstructive pulmonary disease: a systematic review and meta-analysis by Yang Yao, Jing Zhou, Xin Diao and Shengyu Wang in Therapeutic Advances in Respiratory Disease