Predictors of shoulder dystocia at the time of operative vaginal delivery: A prospective population-based cohort study. (March 2019) - Ducarme, Guillaume; Hamel, Jean-François; Madar, Hugo; Mattuizzi, Aurelien; Froeliger, Alizée; Nithart, Angie; Gleyze, Matthieu; Chabanier, Pierre; Sentilhes, Loic