1. Departments of Anatomy & Physiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, P.E.I., Canada C1A 4P3,
2. Departments of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, P.E.I., Canada C1A 4P3,,
3. Norwegian College of Veterinary Medicine, N‐0033 Oslo, Norway,
4. Pathology & Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, P.E.I., Canada C1A 4P3,
5. Atlantic Fish Health Inc., Charlottetown, P.E.I., Canada C1A 4P3,
6. Departments of Pathology & Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, P.E.I., Canada C1A 4P3