1. Clinic of Surgery, School of Health Sciences, Faculty of Veterinary Science, University of Thessaly, Trikalon 224, GR 43100 Karditsa, Greece
2. Laboratory of Epidemiology, Biostatistics and Animal Health Economics, School of Health Sciences, University of Thessaly, Trikalon 224, GR 43100 Karditsa, Greece
3. School of Veterinary Medicine, Aristotle University of Thessaloniki, Stavrou Voutira 11, GR 54124 Thessaloniki, Greece
4. Clinic of Obstetrics and Reproduction, Faculty of Veterinary Science, School of Health Sciences, University of Thessaly, Trikalon 224, GR 43100 Karditsa, Greece