1. Regional Drug and Therapeutics Centre; Newcastle upon Tyne NHS Foundation Trust; Newcastle upon Tyne NE2 4HH UK
2. National Poisons Information Service (Cardiff); Llandough Hospital; Cardiff CF64 2XX UK
3. National Poisons Information Service (Edinburgh); Royal Infirmary of Edinburgh; Edinburgh EH16 4SA UK
4. School of Social and Community Medicine; University of Bristol; Bristol BS8 2PS UK
5. Medical Toxicology Centre; Institute of Cellular Medicine; Newcastle University; Newcastle upon Tyne NE2 4HH UK