1. Electron and Confocal Microscope Laboratory, Faculty of Biology; Adam Mickiewicz University; Poznań Poland
2. Department of Animal Physiology and Developmental Biology, Faculty of Biology; Adam Mickiewicz University; Poznań Poland
3. Department of Molecular Biology and Genetics, Faculty of Arts and Science; Bülent Ecevit University; Zonguldak Turkey
4. Ahmet Erdoðan Vocational School of Health Services; Bülent Ecevit University; Zonguldak Turkey
5. Department of Biology, Faculty of Arts and Science; Bülent Ecevit University; Zonguldak Turkey
6. Dipartimento di Scienze; Università degli Studi della Basilicata; Potenza Italy
7. Department of European and Mediterranean Cultures; University of Basilicata; Matera Italy