Affiliation: | 1.CHUQ, St-Fran?ois d'Assise Hospital Research Center,Quebec,Canada;2.Canada Research Chair on Behaviour and Health,Faculty of Nursing, Laval University,Quebec,Canada;3.INSERM National Institute for Medical Research U149,Epidemiological Research Unit on Perinatal Health and Women's Health,Villejuif cedex,France |