1. Department of Medicine, 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. Department of Pharmacology, University of Sydney, Sydney, Australia;
4. Royal Prince Alfred Hospital, Sydney, Australia;
5. Peradeniya Hospitals, Peradeniya, Sri Lanka;
6. Anuradhapura Hospitals, Anuradhapura, Sri Lanka;
7. Rathnapura Hospitals, Rathnapura, Sri Lanka;
8. Faculty of Medicine, University of Ruhuna, Galle, Sri Lanka;
9. Therapeutics Research Centre, School of Medicine, University of Queensland, Brisbane, Australia;
10. Department of Forensic Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand;
11. National Drug and Alcohol Research Centre, Sydney, Australia;
12. Causation Limited, Macclesfield, UK;
13. Swiss Centre for Applied Human Toxicology, University of Basel, Basel, Switzerland;
14. Department of Pharmacology, Toxicology and Therapeutics, University/BHF Centre for Cardiovascular Science, University of Edinburgh and National Poisons Information Service – Edinburgh Unit, Royal Infirmary of Edinburgh, Edinburgh, UK