Efficacy of ultrasound-guided erector spinae plane block on analgesia and quality of recovery after minimally invasive direct coronary artery bypass surgery: protocol for a randomized controlled trial.

"Declarations Ethics approval and consent to participate {24}The trial will be carried out in conformity to the principles of the Declaration of Helsinki. This study protocol was approved by the Ethical Review Committee of Peking University People’s Hospital (2021PHB237-001). Written informed consent will be obtained from all participants. Consent for publication {32}Model consent form and case report form can be provided upon request. Competing interests {28}The authors declare that they have no competing interests. Competing interests {28} The authors declare that they have no competing interests."

"Funding {4} This work was supported by Horizontal Scientific Research Project of Peking University People’s Hospital (2021-Z-87). The funding body has not participated in the study design, data collection, management, analysis, or interpretation or in the writing of this manuscript."

"Trial registration The study was prospectively registered with the Chinese Clinical Trial Registry (trial identifier: ChiCTR2100052810). Date of registration: November 5, 2021."