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.
Elfeddali I, Bolman C, de Vries H.Elfeddali I, et al. Among authors: de vries h.Contemp Clin Trials. 2012 Jan;33(1):151-8. doi: 10.1016/j.cct.2011.09.008. Epub 2011 Oct 1.Contemp Clin Trials. 2012.PMID: 22015574Clinical Trial.
Dijkstra M, de Vries H, Parcel GS.Dijkstra M, et al. Among authors: de vries h.J Sch Health. 1993 Oct;63(8):339-42. doi: 10.1111/j.1746-1561.1993.tb07148.x.J Sch Health. 1993.PMID: 8289439
Dijkstra A, De Vries H, Roijackers J.Dijkstra A, et al. Among authors: de vries h.Prev Med. 1999 Feb;28(2):203-11. doi: 10.1006/pmed.1998.0407.Prev Med. 1999.PMID: 10048112Clinical Trial.
Mudde AN, De Vries H.Mudde AN, et al. Among authors: de vries h.Am J Public Health. 1999 Mar;89(3):346-50. doi: 10.2105/ajph.89.3.346.Am J Public Health. 1999.PMID: 10076483Free PMC article.Clinical Trial.
Dijkstra A, De Vries H, Roijackers J.Dijkstra A, et al. Among authors: de vries h.Health Educ Res. 1998 Jun;13(2):197-206. doi: 10.1093/her/13.2.197.Health Educ Res. 1998.PMID: 10181018Clinical Trial.
Dijkstra A, De Vries H, Roijackers J.Dijkstra A, et al. Among authors: de vries h.Health Educ Res. 1998 Jun;13(2):207-14. doi: 10.1093/her/13.2.207.Health Educ Res. 1998.PMID: 10181019Clinical Trial.
Dijkstra M, Mesters I, De Vries H, van Breukelen G, Parcel GS.Dijkstra M, et al. Among authors: de vries h.Health Educ Res. 1999 Dec;14(6):791-802. doi: 10.1093/her/14.6.791.Health Educ Res. 1999.PMID: 10585386Clinical Trial.
Ausems M, Mesters I, van Breukelen G, De Vries H.Ausems M, et al. Among authors: de vries h.Prev Med. 2002 Jun;34(6):581-9. doi: 10.1006/pmed.2002.1021.Prev Med. 2002.PMID: 12052017Clinical Trial.