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Schulz DN, Smit ES, Stanczyk NE, Kremers SP, de Vries H, Evers SM.Schulz DN, et al. Among authors: smit es.J Med Internet Res. 2014 Mar 20;16(3):e91. doi: 10.2196/jmir.3159.J Med Internet Res. 2014.PMID: 24650860Free PMC article.Clinical Trial.
van Strien-Knippenberg IS, Altendorf MB, Hoving C, van Weert JCM, Smit ES.van Strien-Knippenberg IS, et al. Among authors: smit es.JMIR Form Res. 2022 Apr 21;6(4):e33886. doi: 10.2196/33886.JMIR Form Res. 2022.PMID: 35451988Free PMC article.