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Snell, KIE ORCID: https://orcid.org/0000-0001-9373-6591, Archer, L ORCID: https://orcid.org/0000-0003-2504-2613, Ensor, J ORCID: https://orcid.org/0000-0001-7481-0282, Bonnett, LJ, Debray, TP, Phillips, B, Collins, GS and Riley, RD ORCID: https://orcid.org/0000-0001-8699-0735 (2021) External validation of clinical prediction models: simulation-based sample size calculations were more reliable than rules-of-thumb. Journal of Clinical Epidemiology.

Bonnett, LJ, Snell, KIE, Collins, GS and Riley, RD ORCID: https://orcid.org/0000-0001-8699-0735 (2019) Guide to presenting clinical prediction models for use in clinical settings. BMJ, 365.