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Groot L, Gademan MGJ, Peter WF, van den Hout WB, Verburg H, Vliet Vlieland TPM, Reijman M; PaTIO study group.Groot L, et al.BMC Musculoskelet Disord. 2020 Aug 14;21(1):544. doi: 10.1186/s12891-020-03511-y.BMC Musculoskelet Disord. 2020.PMID: 32795283Free PMC article.Clinical Trial.