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Lee J, Alferi M, Patel T, Lee L.Lee J, et al. Among authors: patel t.Can Fam Physician. 2011 Mar;57(3):e113-21.Can Fam Physician. 2011.PMID: 21520673Free PMC article.
Lee L, Patel T, Hillier LM, Milligan J.Lee L, et al. Among authors: patel t.Can Respir J. 2016;2016:1083270. doi: 10.1155/2016/1083270. Epub 2016 Jun 22.Can Respir J. 2016.PMID: 27445513Free PMC article.