1. School of Medicine, Medical Sciences and Nutrition, University of Aberdeen , Aberdeen , United Kingdom
2. Department of Histology and Embryology, Poznań University of Medical Sciences , Poznań , Poland
3. Department of Anatomy, Poznań University of Medical Sciences , Poznań , Poland
4. Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Toruń , Toruń , Poland
5. Department of Obstetrics and Gynecology, University Hospital and Masaryk University , Brno , Czech Republic
6. Division of Histology and Embryology, Department of Human Morphology and Embryology, Wrocław Medical University , Wrocław , Poland
7. Division of Anatomy and Histology, University of Zielona Gora , Zielona Góra , Poland
8. Graduate Physiology Program, North Carolina State University , Raleigh , USA