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Cooper LA, Roter DL, Johnson RL, Ford DE, Steinwachs DM, Powe NR.Cooper LA, et al. Among authors: powe nr.Ann Intern Med. 2003 Dec 2;139(11):907-15. doi: 10.7326/0003-4819-139-11-200312020-00009.Ann Intern Med. 2003.PMID: 14644893