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Steel N, Maisey S, Clark A, Fleetcroft R, Howe A.Steel N, et al.Br J Gen Pract. 2007 Jun;57(539):449-54.Br J Gen Pract. 2007.PMID: 17550669Free PMC article.
Steel N, Clark A, Lang IA, Wallace RB, Melzer D.Steel N, et al.J Gerontol A Biol Sci Med Sci. 2008 Jun;63(6):629-34. doi: 10.1093/gerona/63.6.629.J Gerontol A Biol Sci Med Sci. 2008.PMID: 18559639
Steel N, Bachmann M, Maisey S, Shekelle P, Breeze E, Marmot M, Melzer D.Steel N, et al.BMJ. 2008 Aug 13;337:a957. doi: 10.1136/bmj.a957.BMJ. 2008.PMID: 18703659Free PMC article.
Steel N, Hardcastle AC, Bachmann MO, Richards SH, Mounce LTA, Clark A, Lang I, Melzer D, Campbell J.Steel N, et al.BMJ Open. 2014 Oct 24;4(10):e005530. doi: 10.1136/bmjopen-2014-005530.BMJ Open. 2014.PMID: 25344482Free PMC article.