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Bensing JM, Tromp F, van Dulmen S, van den Brink-Muinen A, Verheul W, Schellevis FG.Bensing JM, et al. Among authors: tromp f.BMC Fam Pract. 2006 Oct 25;7:62. doi: 10.1186/1471-2296-7-62.BMC Fam Pract. 2006.PMID: 17064407Free PMC article.
Vermeulen MI, Kuyvenhoven MM, Zuithoff NP, Tromp F, van der Graaf Y, Pieters RH.Vermeulen MI, et al. Among authors: tromp f.Eur J Gen Pract. 2012 Dec;18(4):201-5. doi: 10.3109/13814788.2012.680588. Epub 2012 Apr 20.Eur J Gen Pract. 2012.PMID: 22515833Free article.