1. Newcastle Fertility Centre at Life; Newcastle-upon-Tyne Hospitals; Newcastle-upon-Tyne UK
2. Endocrine Research Group; Institute of Genetic Medicine; University of Newcastle-upon-Tyne; Newcastle-upon-Tyne UK
3. Department of Paediatric Endocrinology; Newcastle-upon-Tyne Hospitals; Newcastle-upon-Tyne UK
4. Department of Endocrinology; Newcastle-upon-Tyne Hospitals; Newcastle-upon-Tyne UK