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Urquia ML, Glazier RH, Blondel B, Zeitlin J, Gissler M, Macfarlane A, Ng E, Heaman M, Stray-Pedersen B, Gagnon AJ; ROAM collaboration.Urquia ML, et al.J Epidemiol Community Health. 2010 Mar;64(3):243-51. doi: 10.1136/jech.2008.083535. Epub 2009 Aug 19.J Epidemiol Community Health. 2010.PMID: 19692737Free PMC article.