1. Veterinary Dispensary, Department of Animal Husbandry, Radhapuram, Villupuram, Tamil Nadu, India.
2. Institute of Virology, Center for Infectious Medicine, Freie University of Berlin, Robert-von-Ostertag-Street 7-13, Berlin - 14163, Germany.
3. Division of Pathology, Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India.
4. Madras Veterinary College, Chennai, Tamil Nadu, India.