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. 2021 Jun 18;2(6):388–396. doi: 10.1302/2633-1462.26.BJO-2021-0020

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© 2021 Author(s) et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (CC BY-NC-ND 4.0) licence, which permits the copying and redistribution of the work only, and provided the original author and source are credited. See https://creativecommons.org/licenses/by-nc-nd/4.0/

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Fig. 1 — Strengthening the Reporting of Observational Studies in Epidemiology (STROBE)³⁰ diagram of cohort assembly for total knee arthroplasty (TKA) and total hip arthroplasty (THA) patients. NSQIP, National Quality Improvement Programme.