(untitled) - American College of Surgeons National Surgical Quality Improvement Program
User Guide for the 2020 ACS NSQIP Procedure Targeted Participant Use Data File (PUF). Accessed August 1, 2022 at: https://www.facs.org/media/c1afx4fn/pt_nsqip_puf_userguide_2020.pdf. November 2021