An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Hak E, Hermens RP, Hoes AW, Verheij TJ, Kuyvenhoven MM, van Essen GA.Hak E, et al. Among authors: verheij tj.Scand J Prim Health Care. 2000 Dec;18(4):237-41. doi: 10.1080/028134300448814.Scand J Prim Health Care. 2000.PMID: 11205093Clinical Trial.
Hak E, Verheij TJ, van Essen GA, Lafeber AB, Grobbee DE, Hoes AW.Hak E, et al. Among authors: verheij tj.Epidemiol Infect. 2001 Apr;126(2):261-8. doi: 10.1017/s0950268801005180.Epidemiol Infect. 2001.PMID: 11357897Free PMC article.
van Elden LJ, van Essen GA, Boucher CA, van Loon AM, Nijhuis M, Schipper P, Verheij TJ, Hoepelman IM.van Elden LJ, et al. Among authors: verheij tj.Br J Gen Pract. 2001 Aug;51(469):630-4.Br J Gen Pract. 2001.PMID: 11510391Free PMC article.
Opstelten W, Hak E, Verheij TJ, van Essen GA.Opstelten W, et al. Among authors: verheij tj.Am J Med. 2001 Oct 15;111(6):474-9. doi: 10.1016/s0002-9343(01)00880-4.Am J Med. 2001.PMID: 11690574
van Duijn H, Kuyvenhoven M, Welschen I, den Ouden H, Slootweg A, Verheij T.van Duijn H, et al.Scand J Prim Health Care. 2002 Dec;20(4):201-2. doi: 10.1080/028134302321004836.Scand J Prim Health Care. 2002.PMID: 12564569
Hak E, Hoes AW, Grobbee DE, Lammers JW, van Essen GA, van Loon AM, Verheij TJ.Hak E, et al. Among authors: verheij tj.Am J Epidemiol. 2003 Apr 15;157(8):692-700. doi: 10.1093/aje/kwg027.Am J Epidemiol. 2003.PMID: 12697573Free PMC article.