1. Clinic of Surgery, Veterinary School, University of Thessaly, Trikalon 224, P.O. Box 199, 43100 Karditsa, Greece
2. Companion Animal Clinic (Medicine), Department of Clinical Studies, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, St. Voutyra 11, 54627 Thessaloniki, Greece
3. Clinic of Obstetrics and Reproduction, Veterinary School, University of Thessaly, Trikalon 224, P.O. Box 199, 43100 Karditsa, Greece