International migration and adverse birth outcomes: role of ethnicity, region of origin and destination
Marcelo Luis Urquia, Richard Henry Glazier, Beatrice Blondel, Jennifer Zeitlin, Mika Gissler, Alison Macfarlane, Edward Ng, Maureen Heaman, Babill Stray-Pedersen, Anita J Gagnon, for the ROAM collaboration*
Journal of Epidemiology & Community Health Mar 2010, 64 (3) 243-251; DOI: 10.1136/jech.2008.083535