References:

1. Cheng N, Gao C, Yang M, Wu Y, Wang G, Xiao C. Analysis of the learning curve for beating heart, totally endoscopic, coronary artery bypass grafting. J Thorac Cardiovasc Surg. 2014 Nov;148(5):1832-6. Epub 2014 Feb 12. PMID: 24629222.
2. Wiedemann D, Bonaros N, Schachner T, et al. Surgical problems and complex procedures: Issues for operative time in robotic totally endoscopic coronary artery bypass grafting. J Thorac Cardiovasc Surg 2012;143:639-47
3. Patrick WL, Iyengar A, Han JJ et al. The Learning Curve of Robotic Coronary Arterial Bypass Surgery: A Report from The STS Database. Journal of Cardiac Surgery. 2021 Aug.
4. Holzhey DM, Seeburger J, Misfeld M, Borger MA and Mohr FW. Learning minimally invasive mitral valve surgery: A cumulative sum sequential probability analysis of 3895 operations from a single high-volume center.
5. Holzhey DM, Jacobs S, Walther T, Mochalski M, Mohr FW and Falk V. Cumulative sum failure analysis for eight surgeons performing minimally invasive direct coronary artery bypass. J Thorac Cardiovasc Surg 2007;134:663-9