1 Centre for Childhood Cancer Survivor Studies, Institute of Applied Health Research, University of Birmingham, Birmingham B15 2TT, UK. Electronic address: r.c.reulen@bham.ac.uk.
2 Centre for Childhood Cancer Survivor Studies, Institute of Applied Health Research, University of Birmingham, Birmingham B15 2TT, UK.
3 National Institute for Health Research, London, UK.
4 Department of Obstetrics and Gynaecology, St Michael's Hospital, Bristol, UK.
5 Department of Paediatric Haematology and Oncology, Royal Hospital for Children and Young People, Edinburgh, UK.
6 Centre for Reproductive Health, Institute for Repair and Regeneration, University of Edinburgh, Edinburgh, UK.