1. Department of Physiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
2. South Asian Clinical Toxicology Research Collaboration, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
3. School of Psychological Sciences, The University of Newcastle, Callaghan, Australia
4. Department of Medicine, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
5. Discipline of Pharmacology, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia