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Clark CE, Smith LF, Taylor RS, Campbell JL.Clark CE, et al. Among authors: campbell jl.Br J Gen Pract. 2010 Mar;60(572):214. doi: 10.3399/bjgp10X483599.Br J Gen Pract. 2010.PMID: 20202370Free PMC article.No abstract available.
Clark CE, Smith LF, Taylor RS, Campbell JL.Clark CE, et al. Among authors: campbell jl.BMJ. 2010 Aug 23;341:c3995. doi: 10.1136/bmj.c3995.BMJ. 2010.PMID: 20732968Free PMC article.Review.
Clark CE, Taylor RS, Shore AC, Ukoumunne OC, Campbell JL.Clark CE, et al. Among authors: campbell jl.Lancet. 2012 Mar 10;379(9819):905-914. doi: 10.1016/S0140-6736(11)61710-8. Epub 2012 Jan 30.Lancet. 2012.PMID: 22293369Free article.Review.
Clark CE, Taylor RS, Shore AC, Campbell JL.Clark CE, et al. Among authors: campbell jl.BMJ. 2012 Mar 20;344:e1327. doi: 10.1136/bmj.e1327.BMJ. 2012.PMID: 22433975Free PMC article.