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Hanf M, Nacher M, Guihenneuc C, Tubert-Bitter P, Chavance M.Hanf M, et al. Among authors: chavance m.BMJ. 2013 Nov 8;347:f6427. doi: 10.1136/bmj.f6427.BMJ. 2013.PMID: 24212105Free PMC article.
Chavance M, Frery N, Valette I, Schaffar-Deshayes L, Monplaisir N.Chavance M, et al.Am J Epidemiol. 1990 Mar;131(3):395-9. doi: 10.1093/oxfordjournals.aje.a115514.Am J Epidemiol. 1990.PMID: 2301349
Hsairi M, Kauffmann F, Chavance M, Brochard P.Hsairi M, et al. Among authors: chavance m.Int J Epidemiol. 1992 Oct;21(5):972-80. doi: 10.1093/ije/21.5.972.Int J Epidemiol. 1992.PMID: 1468862