Michael M Paparella MDDirector, Otology/Neurotology Fellowship, Paparella Ear, Head and Neck Institute; Director, Otopathology Laboratory, Clinical Professor and Chairman Emeritus, Department of Otolaryngology, University of Minnesota; Founder, International Hearing Foundation, Minneapolis, Minnesota, USA Sady Selaimen da Costa MDAssociate Professor, Department of Otolaryngology Head and Neck Surgery, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil Johan Fagan MB ChB FCS MMedLeon Goldman Professor and Chairman, Division of Otolaryngology, University of Cape Town Medical School, Groote Schuur and Red Cross War Memorial Children's Hospitals, Cape Town, South Africa