Centre of Excellence for Child Welfare: 4 pages. Dufour, Sarah Chamberland, Claire Trocmé, Nico Presentation Canadian CW research Published 2003 Poster presented at Child and Youth Health, 3rd World Congress on May 11-14, 2003 in Vancouver, British Columbia. A state-of-knowledge review: What is the effectiveness of child welfare interventions? Additional information available for these authors Dufour, Sarah Chamberland, Claire Trocmé, Nico Research Areas systematic reviews intervention & prevention child welfare system