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van Keulen H, Voogt C, Kleinjan M, Kramer J, Andree R, van Empelen P.van Keulen H, et al. Among authors: kramer j.JMIR Form Res. 2022 Aug 11;6(8):e36969. doi: 10.2196/36969.JMIR Form Res. 2022.PMID: 35969428Free PMC article.
Leone SS, Smeets O, Lokman S, Boon B, van der Poel A, Van Doesum T, Shields-Zeeman L, Kramer J, Smit F.Leone SS, et al. Among authors: kramer j.BMC Prim Care. 2022 Aug 11;23(1):205. doi: 10.1186/s12875-022-01793-w.BMC Prim Care. 2022.PMID: 35948866Free PMC article.Clinical Trial.
Riper H, Kramer J, Keuken M, Smit F, Schippers G, Cuijpers P.Riper H, et al. Among authors: kramer j.J Med Internet Res. 2008 Nov 22;10(4):e46. doi: 10.2196/jmir.1102.J Med Internet Res. 2008.PMID: 19033150Free PMC article.Clinical Trial.
Kramer J, Conijn B, Oijevaar P, Riper H.Kramer J, et al.J Med Internet Res. 2014 May 29;16(5):e141. doi: 10.2196/jmir.3261.J Med Internet Res. 2014.PMID: 24874006Free PMC article.Clinical Trial.