1. CTDS; Blacksmiths Forge; Brookfield Farm, Selby Road, Garforth Leeds West Yorkshire LS25 1NB
2. Westmorland Veterinary Group; Kendal Road Kirkby Lonsdale Cumbria LA6 2HH
3. School of Veterinary Medicine; University of Pennsylvania; 3800 Spruce Street Philadelphia PA 19104 USA