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Mulders MAM, Selles CA, Colaris JW, Peters RW, van Heijl M, Cleffken BI, Schep NWL.Mulders MAM, et al. Among authors: peters rw.Trials. 2018 Feb 2;19(1):84. doi: 10.1186/s13063-017-2409-2.Trials. 2018.PMID: 29394904Free PMC article.