1. Intensive care unit, Provincial General Hospital, Ratnapura, Sri Lanka
2. Department of Veterinary Pathobiology, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Sri Lanka
3. Postgraduate Institute of Medicine, University of Colombo (Clinical Pharmacology and Therapeutics), Sri Lanka
4. Medical Unit, Provincial General Hospital, Ratnapura, Sri Lanka
5. Department of Medicine, Faculty of Medicine, University of Peradeniya, Sri Lanka