1. Department of Clinical Medicine, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
2. Department of Pathology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
3. Department of Medicine and South Asian Clinical Toxicology Research Collaboration, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
4. Department of Physiology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
5. Clinical Toxicology Research Group, University of Newcastle, Newcastle, New South Wales, Australia
6. South Asian Clinical Toxicology Research Collaboration, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka