1. Andrology Laboratory, Riga Stradins University, Riga, Latvia
2. Department of Andrology, Clinic “IVF-Riga”, Riga, Latvia
3. Department of Gynecology and Reproduction, Clinic “IVF-Riga”, Riga, Latvia
4. Genetic Laboratory, Clinic “IVF-Riga”, Riga, Latvia
5. Dr. Pozarskis Private Practice, Daugavpils, Latvia