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Luijks H, Schermer T, Bor H, van Weel C, Lagro-Janssen T, Biermans M, de Grauw W.Luijks H, et al.BMC Med. 2012 Oct 29;10:128. doi: 10.1186/1741-7015-10-128.BMC Med. 2012.PMID: 23106808Free PMC article.
Teunissen D, van den Bosch W, van Weel C, Lagro-Janssen T.Teunissen D, et al.Scand J Prim Health Care. 2006 Mar;24(1):56-61. doi: 10.1080/02813430500417920.Scand J Prim Health Care. 2006.PMID: 16464816
Teunissen D, Van Den Bosch W, Van Weel C, Lagro-Janssen T.Teunissen D, et al.Scand J Prim Health Care. 2006 Sep;24(3):166-73. doi: 10.1080/02813430600739371.Scand J Prim Health Care. 2006.PMID: 16923626Free article.