1. Department of Phoniatrics and Pediatric Audiology University Hospital Münster Westphalian Wilhelm University Münster Germany
2. Speech‐Language Pathology SRH University of Applied Health Sciences Düsseldorf Germany
3. Department of Otorhinolaryngology‐Head and Neck Surgery and Biomedical Research Institute Pusan National University Hospital Busan South Korea
4. Department of Speech‐Language Therapy CREN Salud Tenerife Spain
5. Department of Otorhinolaryngology Japan Community Health Care Organization Osaka Hospital Osaka Japan
6. Department of Otorhinolaryngology Osaka Police Hospital Osaka Japan
7. Department of Otorhinolaryngology and Head & Neck Surgery Osaka University Graduate School of Medicine Osaka Japan
8. Department of Communication Disorders UNIFESP – Universidade Federal de São Paulo São Paulo Brazil
9. CEV Centro de Estudos da Voz São Paulo Brazil
10. Department of Statistics Medical Faculty Mannheim Ruprecht Karls University of Heidelberg Mannheim Germany