1. Department of Endocrinology and Metabolism, Pilgrim Hospital, Boston, PE21 9QS, United Kingdom
2. Department of Medicine, Blackpool Victoria Hospital, Blackpool, FY3 8NR, United Kingdom
3. Department of Medicine and Endocrinology, Royal Preston Hospital, Preston, PR2 9HT, United Kingdom
4. Department of Medicine, Royal Preston Hospital, Preston, PR2 9HT, United Kingdom
5. Professor of Endocrinology and Metabolism, Staffordshire University/ University Hospitals of North Midlands, Preston, ST4 6QG, United Kingdom