Stavros Hatzopoulos, PhD, is a faculty member of the Audiology & ENT Clinic, University of Ferrara, Italy. Andrea Ciorba, MD, PhD, has been a member of the Audiology & ENT Clinic, University of Ferrara, Italy, since 2004. Mark Krumm, PhD, is an associate professor in the School of Speech Pathology and Audiology at Kent State University in Kent, Ohio (USA).