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Hak E, Rovers MM, Sachs AP, Stalman WA, Verheij TJ.Hak E, et al. Among authors: stalman wa.Eur J Epidemiol. 2003;18(9):899-902. doi: 10.1023/a:1025674816487.Eur J Epidemiol. 2003.PMID: 14561050
Hak E, van Essen GA, Buskens E, Stalman W, de Melker RA.Hak E, et al.J Epidemiol Community Health. 1998 Feb;52(2):120-5. doi: 10.1136/jech.52.2.120.J Epidemiol Community Health. 1998.PMID: 9578860Free PMC article.
Hak E, van Essen GA, Stalman WA, de Melker RA.Hak E, et al. Among authors: stalman wa.Fam Pract. 1998 Apr;15(2):138-43. doi: 10.1093/fampra/15.2.138.Fam Pract. 1998.PMID: 9613481
Stalman W, van Essen GA, van der Graaf Y, de Melker RA.Stalman W, et al.Br J Gen Pract. 1997 Dec;47(425):794-9.Br J Gen Pract. 1997.PMID: 9463979Free PMC article.Clinical Trial.
Stalman WA, van Essen GA, van der Graaf Y.Stalman WA, et al.Postgrad Med J. 2001 Dec;77(914):778-82. doi: 10.1136/pmj.77.914.778.Postgrad Med J. 2001.PMID: 11723317Free PMC article.