1. Section of Women's Mental Health, Institute of Psychiatry, Psychology and Neuroscience, King's College London London UK
2. Warwick Clinical Trials Unit, Warwick Medical School University of Warwick Coventry UK
3. Child and Maternal Mental Health Team, South London and Maudsley NHS Foundation Trust London UK
4. Department of Biostatistics and Health Informatics & Health Service and Population Research Department, School of Mental Health and Psychological Sciences, Institute of Psychiatry, Psychology and Neuroscience, King's College London London UK
5. Department of Surgery and Cancer Imperial College London London UK
6. Health Service and Population Research Department, Institute of Psychiatry, Psychology and Neuroscience, King's College London London UK
7. Methodologies Research Division, Florence Nightingale Faculty of Nursing, Midwifery and Palliative Care, King's College London London UK