लेखक: Paul T. Hoff

Claudio Vicini, MD Head & Neck Department, ASL Romagna Otolaryngology – Head and Neck Surgery Unit, Stomatology and Oral Surgery Unit,   GB Morgagni – L Pierantoni Hospital (Forlì),   Infermi Hospital (Faenza), Italy Paul Theodore Hoff, MS, MDUniversity of Michigan Hospital Department of Otolaryngology – Head and Neck Surgery Ann Arbor, Michigan, USA Filippo Montevecchi, MD Head & Neck Department, ASL Romagna Otolaryngology – Head and Neck Surgery Unit, Stomatology and Oral Surgery Unit,   GB Morgagni – L Pierantoni Hospital (Forlì),   Infermi Hospital (Faenza), Italy