1. Florence Nightingale School of Nursing and Midwifery, Kings College London, London SE1 8WA, UK
2. Department of Psychology, Institute of Psychiatry, Kings College London, De Crespigny Park, London SE5 8AF, UK
3. Department of Haematology, Guy's Hospital, 4th Floor Southwark Wing, Great Maze Pond, London SE1 9RT, UK