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.
Lindbaek M, Francis N, Cannings-John R, Butler CC, Hjortdahl P.Lindbaek M, et al.Scand J Prim Health Care. 2006 Jun;24(2):93-7. doi: 10.1080/02813430600638227.Scand J Prim Health Care. 2006.PMID: 16690557Free article.Clinical Trial.
Cals JW, Hood K, Aaftink N, Hopstaken RM, Francis NA, Dinant GJ, Butler CC.Cals JW, et al. Among authors: francis na.Br J Gen Pract. 2009 Oct;59(567):761-4. doi: 10.3399/bjgp09X472656.Br J Gen Pract. 2009.PMID: 19843422Free PMC article.
Melbye H, Francis NA, Butler CC.Melbye H, et al. Among authors: francis na.Prim Care Respir J. 2011 Dec;20(4):367-9. doi: 10.4104/pcrj.2011.00086.Prim Care Respir J. 2011.PMID: 22009323Free PMC article.No abstract available.