1. National Poisons Information Service, Newcastle Unit; Newcastle upon Tyne Hospitals NHS Foundation Trust; Newcastle upon Tyne NE2 4HH UK
2. Royal Liverpool and Broadgreen University Hospitals NHS Trust; Liverpool L7 8XP UK
3. University of Liverpool; Department of Pharmacology, Institute of Translational Medicine; Liverpool L69 3BX UK
4. Medical Toxicology Centre, Institute of Cellular Medicine, Wolfson Unit; Newcastle University; Newcastle NE2 4HH UK