1. Medical Academy, Lithuanian University of Health Sciences, LT50161 Kaunas, Lithuania
2. Department of Internal Medicine, Nicolae Testemitanu State University of Medicine and Pharmacy, MD2004 Chisinau, Moldova
3. Department of Human Physiology and Biochemistry, Rīga Stradiņš University, LV-1007 Riga, Latvia
4. Veterinary Academy, Lithuanian University of Health Sciences, LT47181 Kaunas, Lithuania