Amiridis G S, Billinis C, Papanikolaou T, Psychas V, Kanteres D
Department of Obstetrics and Reproduction, Faculty of Veterinary Medicine, University of Thessaly, PO Box 199, GR-43100 Karditsa, Greece.
Vet Rec. 2004 May 29;154(22):698-9. doi: 10.1136/vr.154.22.698.