1. Pharmacology and Clinical Pharmacology, Department of Basic Medical Sciences, St George’s Hospital Medical School, Jenner Wing, Cranmer Terrace; National Poisons Information Service (London), Guy’s and St Thomas’ Hospital; London SW17 0RE, UK;
2. The Royal Surrey County Hospital NHS Trust, Guildford, UK
3. National Poisons Information Service (London), Guy’s and St Thomas’ Hospital, London, UK