REFERENCES
1. Skirbekk V, Dieleman JL, Stonawski M, et al. The health-adjusted dependency ratio as a new global measure of the burden of ageing: a population-based study. Lancet Healthy Longev 2022;3:e332-8.
2. Mueller M, Breuer E, Mizuno T, et al. Perihilar cholangiocarcinoma - novel benchmark values for surgical and oncological outcomes from 24 expert centers. Ann Surg 2021;274:780-8.
3. Yamakawa T, Kano N, Sakai S, et al. Preliminary experience using an ultrasonic aspirator for laparoscopic cholecystectomy. Endoscopy 1992;24:721-3.
4. Kaneko H, Takagi S, Shiba T. Laparoscopic partial hepatectomy and left lateral segmentectomy: technique and results of a clinical series. Surgery 1996;120:468-75.
5. Miura F, Yamamoto M, Gotoh M, et al. Validation of the board certification system for expert surgeons (hepato-biliary-pancreatic field) using the data of the National Clinical Database of Japan: part 1 - hepatectomy of more than one segment. J Hepatobiliary Pancreat Sci 2016;23:313-23.
6. Marubashi S, Takahashi A, Kakeji Y, et al. Surgical outcomes in gastroenterological surgery in Japan: report of the National Clinical Database 2011-2019. Ann Gastroenterol Surg 2021;5:639-58.
7. Ban D, Tanabe M, Kumamaru H, et al. Safe dissemination of laparoscopic liver resection in 27,146 cases between 2011 and 2017 from the National Clinical Database of Japan. Ann Surg 2021;274:1043-50.
8. Goh BKP, Han HS, Chen KH, et al. Defining global benchmarks for laparoscopic liver resections: an international multicenter study. Ann Surg ;2022:10.1097.
9. Ohtsuka T, Nagakawa Y, Toyama H, et al. A multicenter prospective registration study on laparoscopic pancreatectomy in Japan: report on the assessment of 1,429 patients. J Hepatobiliary Pancreat Sci 2020;27:47-55.
10. Nakata K, Yamamoto H, Miyata H, et al. Comparison of outcomes between laparoscopic and open pancreaticoduodenectomy without radical lymphadenectomy: results of coarsened exact matching analysis using national database systems. Asian J Endosc Surg 2022;15:15-21.
11. Ban D, Tanabe M, Ito H, et al. A novel difficulty scoring system for laparoscopic liver resection. J Hepatobiliary Pancreat Sci 2014;21:745-53.