1. Department of Physiology, Hacettepe University Faculty of Medicine, 06230 Ankara, Turkey
2. Department of Cardiology, Dr Ersin Arslan Research and Education Hospital, 27010 Gaziantep, Turkey
3. Department of Histology & Embryology, Gaziosmanpaşa University Faculty of Medicine, 60030 Tokat, Turkey
4. Department of Histology & Embryology, Hacettepe University Faculty of Medicine, 06230 Ankara, Turkey