1. Saka N, Yamamoto N, Watanabe J, et al. Comparison of postop- erative outcomes among patients treated by male versus female surgeons: a systematic review and meta-analysis. Ann Surg. 2024;280:945−53.

2. Gelb AW, Morriss WW, Johnson W, et al. World Health Organiza- tion-World Federation of Societies of Anaesthesiologists (WHO- WFSA) international standards for a safe practice of anesthesia. Anesth Analg. 2018;126:2047−55.

3. Sun EC, Miller TR, Moshfegh J, Baker LC. Anesthesia care team composition and surgical outcomes. Anesthesiology. 2018;129: 700−9.

4. Moher D, Liberati A, Tetzlaff J, Altman DG. PRISMA Group. Preferred reporting items for systematic reviews and meta- analyses: the PRISMA statement. PLoS Med. 2009;6: e1000097.

5. Sterne JA, Hernán MA, Reeves BC, et al. ROBINS-I: a tool for assessing risk of bias in non-randomised studies of interven- tions. BMJ. 2016;355:i4919.

6. Chui J, Ng W, Yang V, Duggal N. The impact of neuroanesthesia fellowship training and anesthesiologist-surgeon dyad volume on patient outcomes in adult spine surgery: a population-based study. J Neurosurg Anesthesiol. 2025;37:206−15.

7. Jerath A, Satkunasivam R, Kaneshwaran K, et al. Association between anesthesiologist sex and patients’ postoperative out- comes: a population-based cohort study. Ann Surg. 2024; 279:569−74.

8. von Wedel D, Redaelli S, Wachtendorf LJ, et al. Association of anaesthesia provider sex with perioperative complications: a two-centre retrospective cohort study. Br J Anaesth. 2024;133:628−36.

9. Zeiner S, Maleczek M, Laxar D, Bologheanu R, Schaden E, Kimberger O. Association between anaesthesiologists’ sex and anaesthesiology quality metrics and postoperative outcomes: a retrospective analysis. J Clin Med. 2024;13:6986.

10. Hertzberg LB, Miller TR, Byerly S, et al. Gender differences in compensation in anesthesiology in the United States: results of a national survey of anesthesiologists. Anesth Analg. 2021;133: 1009−18.