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Morton SC, Adams JL, Suttorp MJ, Shekelle PG.Morton SC, et al.Rockville (MD): Agency for Healthcare Research and Quality (US); 2004 Mar. Report No.: 04-0033.Rockville (MD): Agency for Healthcare Research and Quality (US); 2004 Mar. Report No.: 04-0033.PMID: 20734524Free Books & Documents.Review.