1. Tinnitus Center, Charité—Universitätsmedizin Berlin, 10117 Berlin, Germany
2. Department of Otorhinolaryngology—Head and Neck Surgery, Universitätsklinikum Erlangen, 91054 Erlangen, Germany
3. Department of Psychiatry, Universitätsklinikum Regensburg, 93053 Regensburg, Germany
4. Institute for Information and Process Management, Eastern Switzerland University of Applied Sciences, 9001 St. Gallen, Switzerland
5. Department of Otorhinolaryngology, Jena University Hospital, 07743 Jena, Germany