1. Department of Biophysics, Faculty of Medicine, Center for Integrative Physiology and Molecular Medicine (CIPMM), Saarland University, Homburg, Germany.
2. Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss Kiril i Metodij University, Skopje, Macedonia.
3. Cardiovascular Physiology, University Medical Center, University of Göttingen, Göttingen, Germany.
4. HEKA Elektronik Dr. Schulze GmbH, Lambrecht, Germany.