1 Health Psychology Section, Department of Psychology, Institute of Psychiatry, Psychology & Neuroscience, Guy's Hospital, King's College London, SE1 9RT, United Kingdom. Electronic address: philippa.davie@kcl.ac.uk.
2 Department of Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, St Thomas' Hospital, King's College London, SE1 7EH, United Kingdom. Electronic address: debra.bick@kcl.ac.uk.
3 Health Psychology Section, Department of Psychology, Institute of Psychiatry, Psychology & Neuroscience, Guy's Hospital, King's College London, SE1 9RT, United Kingdom. Electronic address: joseph.chilcot@kcl.ac.uk.