1. Kang HW, Seo SP, Kim WT, Kim YJ, Yun SJ, Lee SC, Choi YD, Ha YS, Kim TH, Kwon TG, et al. Impact of the ASA physical status score on adjuvant chemotherapy eligibility and survival of upper tract urothelial carcinoma patients: a multicenter study. J Korean Med Sci. 2017; 32:335–342.
2. Sankar A, Johnson SR, Beattie WS, Tait G, Wijeysundera DN, Myles PS. Reliability of the American Society of Anesthesiologists physical status scale in clinical practice. Br J Anaesth. 2014; 113:424–432.
3. Davenport DL, Ferraris VA, Hosokawa P, Henderson WG, Khuri SF, Mentzer RM Jr. Multivariable predictors of postoperative cardiac adverse events after general and vascular surgery: results from the patient safety in surgery study. J Am Coll Surg. 2007; 204:1199–1210.