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Knight EL, Glynn RJ, Levin R, Ganz DA, Avorn J.Knight EL, et al. Among authors: levin r.J Gen Intern Med. 2000 Oct;15(10):702-9. doi: 10.1046/j.1525-1497.2000.91020.x.J Gen Intern Med. 2000.PMID: 11089713Free PMC article.