Kerry Layne ST1, Core Medical Training, University Hospital Lewisham MB BS, BSc (Hons) and MRCP Henry Fok ST3, Academic Clinical Fellow in Clinical Pharmacology, Guy's and St Thomas' NHS Foundation Trust MB BS, BSc (Hons) and MRCP Adam Nabeebaccus ST3, Academic Clinical Fellow in Cardiology, Medway Maritime Hospital MB ChB, BSc (Hons) and MRCP