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- Cochrane Handbook for Systematic Reviews of Interventions version 6.2 (updated February 2021).in: Higgins J.P.T. Thomas J. Chandler J. Cumpston M. Li T. Page M.J. 2021 (Available at)www.training.cochrane.org/handbookDate accessed: March 15, 2021
- If there is only one author or only one database was searched, a study should not be called a systematic review.J Clin Epidemiol. 2017; 91: 4-5
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Conflict of interest statement: None.
Author statement: RLP, RR, and ALCM contributed in conceptualization. GMS, KMMS, LGPB, GRS, FRO, RLP, and ALCM contributed in data extraction. GMS, KMMS, LGPB, GRS, FRO, and RLP contributed by writing the original draft. ALCM and RR contributed in writing, reviewing and editing. RR contributed by supervising. RLP helped in project supervision. Funding acquisition: Not applicable. Final approval: all authors.