Animal Health Trust, Lanwades Park, Kentford, Newmarket, Suffolk, CB8 7UU † Current adderss for Vicki J. Adams is Veterinary Epidemiologist, PO Box 80, Bury St Edmunds, Suffolk, IP28 9BF Publication History Issue published online: 5 JUL 2010 Article first published online: 5 JUL 2010 ...