[1] Univ Twente, Dept Hlth Psychol & Technol, Enschede, Netherlands
[2] Univ Zurich, Univ Hosp Zurich, Dept Otorhinolaryngol Head & Neck Surg, Zurich, Switzerland
[3] Univ Regensburg, Dept Psychiat & Psychotherapy, Regensburg, Germany
[4] Otto von Guericke Univ, Univ Lib, Magdeburg, Germany