1 Department of Women's Cancer, Institute for Women's Health, University College London, London W1T 7DN, UK; University of New South Wales, Sydney, NSW, Australia; Centre for Women's Health, Institute of Human Development, University of Manchester, Manchester, UK.
2 Medical Research Council Clinical Trials Unit at University College London, London, UK.
3 Biostatistics Center, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA.
4 Department of Women's Cancer, Institute for Women's Health, University College London, London W1T 7DN, UK. Electronic address: u.menon@ucl.ac.uk.