Distance Education System for Teaching Manual Skills in Endoscopic Paranasal Sinus Surgery Using "HyperMirror" Telecommunication Interface. - Toru Kumagai; Juli Yamashita; Osamu Morikawa; Kazunori Yokoyama; Shin'ichi Fujimaki; Taku Konishi; Hiroshi Ishimasa; Hideyuki Murata; Koichi Tomoda (VR, 2008)