N. Chaillet,E. Bujold,B. Masse,W. A. Grobman,P. Rozenberg,J. C. Pasquier,A. Shorten,M. Johri,F. Beaudoin,H. Abenhaim,S. Demers,W. Fraser,M. Dugas,S. Blouin,E. Dubé and R. Gauthier. A cluster-randomized trial to reduce major perinatal morbidity among women with one prior cesarean delivery in Québec (PRISMA trial): study protocol for a randomized controlled trial. Trials. 2017;18(1):10.1186/s13063-017-2150-x.