[1] Univ Hosp Bristol NHS Fdn Trust, Bristol Royal Infirm, Dept Endocrinol, Bristol, Avon, England
[2] Cardiff Univ, Sch Med, Dept Med, Ctr Endocrine & Diabet Sci, Cardiff, S Glam, Wales
[3] Univ Bristol, Henry Wellcome Labs Integrat Neurosci & Endocrino, Bristol, Avon, England
[4] Epidemiol London Sch Hyg & Trop Med, London, England
[5] Royal Devon & Exeter Hosp, Peninsula Med Sch, Dept Endocrinol, Exeter EX2 5DW, Devon, England
[6] Univ Pisa, Dept Endocrinol & Metab, Pisa, Italy
[7] Univ Insubria, Dept Clin Med, Varese, Italy