RT Journal Article SR Electronic T1 Analysis in statistical perspective about the article titled “Pre-emptive epidural analgesia for acute and chronic post-thoracotomy pain in adults: a systematic review and meta-analysis” JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP rapm-2020-102319 DO 10.1136/rapm-2020-102319 A1 Yifeng Ren A1 Xi Fu A1 Yuting Wang A1 Hong Liu A1 Qiaoling Wang A1 Fengming You YR 2021 UL http://rapm.bmj.com/content/early/2021/02/09/rapm-2020-102319.abstract AB