Affiliation: | 1. Cardiology Service, Small Animal Teaching Hospital, Institute of Infection, Veterinary and Ecological Science, University of Liverpool, Neston, Chester, CH64 7TE UK;2. Cardiology Service, Small Animal Teaching Hospital, Institute of Infection, Veterinary and Ecological Science, University of Liverpool, Neston, Chester, CH64 7TE UK Cardiology Service, Willows Veterinary Centre and Referral Service, Shirley, Solihull, B90 4NH UK;3. Cardiology Service, Small Animal Teaching Hospital, Institute of Infection, Veterinary and Ecological Science, University of Liverpool, Neston, Chester, CH64 7TE UK Cardiology Service, Southfields Veterinary Specialists, Basildon, Essex, SS15 6TP UK |