The Rostral Mucosa: The Door to Open and Close for Targeted Endoscopic Endonasal Approaches to the Clivus. Issue 3 (16th August 2021) - di Russo, Paolo; Fava, Arianna; Giammattei, Lorenzo; Passeri, Thibault; Okano, Atsushi; Abbritti, Rosaria; Penet, Nicolas; Bernat, Anne-Laure; Labidi, Moujahed; Froelich, Sebastien