1 University of Zürich, Psychological Institute, Neuroplasticity and Learning in the Healthy Aging Brain, Andreasstraße 15/Box 2, 8050 Zürich, Switzerland.
2 Department of Psychiatry and Psychotherapy, University of Regensburg, Universitaetsstraße 84, 93053 Regensburg, Germany.
3 Department of Otorhinolaryngology, University of Zürich, Frauenklinikstraße 24, 8091 Zürich, Switzerland.
4 School of Behavioral and Brain Sciences, University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX 75080, USA.