E Maclean (Presenting Author) – Queen Mary University of London, London, UK; R Simon – St Bartholomew’s Hospital, London, UK; G Dhillon – St Bartholomew’s Hospital, London, UK; S Ahsan – St Bartholomew’s Hospital, London, UK; R Hunter – St Bartholomew’s Hospital, London, UK; JM Behar – St Bartholomew’s Hospital, London, UK