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Baron M, Lewis V.Baron M, et al. Among authors: lewis v.N Engl J Med. 2001 Jul 19;345(3):180. doi: 10.1056/NEJM200107193450305.N Engl J Med. 2001.PMID: 11463013Free article.No abstract available.
Lewis VA, McClurg AB, Smith J, Fisher ES, Bynum JP.Lewis VA, et al.Health Aff (Millwood). 2013 Mar;32(3):587-95. doi: 10.1377/hlthaff.2012.0489.Health Aff (Millwood). 2013.PMID: 23459739Free PMC article.