Single-Access Fetal Endoscopy (SAFE) for myelomeningocele in sheep model I: amniotic carbon dioxide gas approach - Peiro, Jose L.; Fontecha, Cesar G.; Ruano, Rodrigo; Esteves, Marielle; Fonseca, Carla; Marotta, Mario; Haeri, Sina; Belfort, Michael A. (Surgical Endoscopy, 2013)