From:  Oral health conditions and hygiene procedures in patients with Parkinson’s disease: a systematic review

Research flow diagram according to PRISMA statement. PRISMA: Preferred Reporting Items for Systematic Reviews and Meta Analyses

Note. Adapted from “The PRISMA 2020 statement: an updated guideline for reporting systematic reviews” by Page MJ, McKenzie JE, Bossuyt PM, Boutron I, Hoffmann TC, Mulrow CD, et al. BMJ. 2021;372:n71 (https://doi.org/10.1136/bmj.n71). CC BY.