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Benchimol EI, Guttmann A, Griffiths AM, Rabeneck L, Mack DR, Brill H, Howard J, Guan J, To T.Benchimol EI, et al. Among authors: guan j.Gut. 2009 Nov;58(11):1490-7. doi: 10.1136/gut.2009.188383. Epub 2009 Aug 2.Gut. 2009.PMID: 19651626
Zamakhshary M, To T, Guan J, Langer JC.Zamakhshary M, et al. Among authors: guan j.CMAJ. 2008 Nov 4;179(10):1001-5. doi: 10.1503/cmaj.070923.CMAJ. 2008.PMID: 18981440Free PMC article.
To T, Wang C, Guan J, McLimont S, Gershon AS.To T, et al. Among authors: guan j.Am J Respir Crit Care Med. 2010 Feb 15;181(4):337-43. doi: 10.1164/rccm.200907-1035OC. Epub 2009 Nov 19.Am J Respir Crit Care Med. 2010.PMID: 19926867