1. Department of Physiology, University of Peradeniya, Peradeniya, Sri Lanka;
2. South Asian Clinical Toxicology Research Collaboration, University of Peradeniya, Peradeniya, Sri Lanka;
3. School of Psychology, The University of Newcastle, Callaghan, Australia;
4. Department of Medicine, University of Peradeniya, Peradeniya, Sri Lanka;
5. The Discipline of Pharmacology, School of Medical Sciences, University of Sydney, Sydney, Australia