Affiliation: | (1) Guy’s and St Thomas’ NHS Foundation Trust, Guy’s and St Thomas’ Poisons Unit, Avonley Road, London, SE14 5ER, UK;(2) Analytical Unit, St. George’s University of London, London, UK;(3) General Medicine and Clinical Pharmacology, St George’s University of London, London, UK;(4) TICTAC Communications Ltd, St. George’s University of London, London, UK |