1. Institute of Biomedical Engineering, Boğaziçi University, Kandilli Campus, Rasathane Cd. Uskudar, 34684 Istanbul, Turkey
2. Center of Physiology and Pathophysiology, Institute for Neurophysiology, Medical Faculty, University of Cologne, Robert-Koch-Str. 39, 50931 Cologne, Germany
3. Department of Chemistry, Hacettepe University, Beytepe Campus, 06800 Ankara, Turkey
4. Department of Chemistry, Eskisehir Technical University, 2 Eylül Campus Tepebaşı, 26555 Eskisehir, Turkey