1. Institute of Psychology; Department of Neuropsychology; University of Zurich; Zurich; Switzerland
2. Center of Dental Medicine, Clinic of Masticatory Disorders; Removable Prosthodontics, and Special Care Dentistry, University of Zurich; Zurich; Switzerland
3. Institute of Biomedical Engineering; Swiss Federal Institute of Technology and the University of Zurich; Zurich; Switzerland
4. GlaxoSmithKline, Consumer Healthcare; Weybridge; Surrey; UK