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.
Somerset M, Sharp D, Campbell R.Somerset M, et al. Among authors: campbell r.J Health Serv Res Policy. 2002 Jul;7(3):151-9. doi: 10.1258/135581902760082454.J Health Serv Res Policy. 2002.PMID: 12171745
Britten N, Campbell R, Pope C, Donovan J, Morgan M, Pill R.Britten N, et al. Among authors: campbell r.J Health Serv Res Policy. 2002 Oct;7(4):209-15. doi: 10.1258/135581902320432732.J Health Serv Res Policy. 2002.PMID: 12425780
Glogowska M, Campbell R, Peters TJ, Roulstone S, Enderby P.Glogowska M, et al. Among authors: campbell r.Child Care Health Dev. 2002 Nov;28(6):513-21. doi: 10.1046/j.1365-2214.2002.00297.x.Child Care Health Dev. 2002.PMID: 12568481Clinical Trial.
Somerset M, Peters TJ, Sharp DJ, Campbell R.Somerset M, et al. Among authors: campbell r.Qual Life Res. 2003 Feb;12(1):21-9. doi: 10.1023/a:1022088203586.Qual Life Res. 2003.PMID: 12625515