1 University of Warwick Medical School, Coventry and University Hospitals, Coventry and Warwickshire NHS Trust, Coventry CV4 7AL, UK. Electronic address: [email protected].
2 Royal Gwent Hospital and Oak Street Surgery, Cwmbran, UK.
3 University Hospital Birmingham, Birmingham, UK.
4 Barnet, Enfield and Harringey Mental Health Trust, London, UK.
5 Queen Mary, University of London, and St Bartholomews Hospital, London, UK.
6 Swansea University and Abertawe Bro Morgannwg University Health Board, Swansea, UK.
7 University of Birmingham and Heart of England NHS Foundation Trust, Birmingham, UK.