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Nápoles-Springer AM, Santoyo J, Stewart AL.Nápoles-Springer AM, et al. Among authors: stewart al.J Gen Intern Med. 2005 May;20(5):438-43. doi: 10.1111/j.1525-1497.2005.0078.x.J Gen Intern Med. 2005.PMID: 15963168Free PMC article.Clinical Trial.