1. Research Department, Bartenbach LichtLabor GmbH Ringgold Standard Institution, Bartenbach GmbH, Rinnerstrasse 14, Aldrans 6071, Austria
2. Department of Psychology, University of Graz, Graz, Austria
3. Institute of Ion Physics and Applied Physics, University of Innsbruck, Innsbruck, Tirol, Austria
4. Department of Psychiatry and Psychotherapy A, General Hospital, Milserstrasse 10 , Hall Tirol 6060, Austria