1. Faculty of Arts and Science, Department of Biology, Düzce University, Düzce, Turkey;
2. Faculty of Arts and Science, Department of Biology, Abant İzzet Baysal University, Bolu, Turkey;
3. Department of Physiology, Faculty of Medicine, Niğde Ömer Halisdemir University, Niğde, Turkey;
4. Faculty of Medicine, Department of Histology and Embryology, Abant İzzet Baysal University, Bolu, Turkey