1. MossVet; 34 Seagoe Industrial Estate, Portadown Craigavon County Armagh BT35 8UJ Northern Ireland, UK
2. Tests and Trials; Ignacio de Luzan 24 22400 Monzon Huesca Spain
3. Agri-Food and Biosciences Institute; Veterinary Sciences Division; Stormont Belfast BT4 3SD Northern Ireland UK