1. Aúna Especialidades Veterinarias Valencia Spain
2. CVS Referrals, Bristol Veterinary Specialists at Highcroft Bristol UK
3. The Royal Veterinary College, University of London Hatfield UK
4. Hospital Veterinari Canis Palma de Mallorca Spain
5. Ars Veterinaria Barcelona Spain
6. Department of Pathology, School of Medicine University of California and Comparative Neuromuscular Laboratory San Diego California USA