Retraction Note: Preoperative versus postoperative ultrasound-guided rectus sheath block for improving pain, sleep quality and cytokine levels in patients with open midline incisions undergoing transabdominal gynecological surgery: a randomized controlled trial.

Authors	Feng Jin, Zhe Li, Wen-Fei Tan, Hong Ma, Xiao-Qian Li, Huang-Wei Lu
Journal	BMC anesthesiology (BMC Anesthesiol) Vol. 21 Issue 1 Pg. 230 (09 23 2021) ISSN: 1471-2253 [Electronic] England
PMID	34551704 (Publication Type: Journal Article, Retraction of Publication)

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