A core outcome set development for a French national prospective study about the effect of mediolateral episiotomy on obstetric anal sphincter injury during operative vaginal deliv... by Bertrand Gachon, Thomas Schmitz, France Artzner, Olivier Parant, Renaud De Tayrac, Guillaume Ducarme, Camille Le Ray, Anne Cécile Pizzoferrato, Charles Garabedian, Didier Riethmuller, Fabrice Pierre, Stephanie Ragot, Xavier Fritel, the GROG (Groupe de Recherche en Gynécologie Obstétrique)

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