[1] Cent Manchester Univ Hosp Fdn Trust, Manchester Royal Infirm, Dept Endocrinol, Manchester, Lancs, England
[2] Leeds Teaching Hosp NHS Trust, Leeds Gen Infirm, Blood Sci, Leeds, W Yorkshire, England
[3] Univ Hosp Leicester, Leicester Royal Infirm, Dept Endocrinol, Leicester, Leics, England
[4] Soc Endocrinol, 22 Apex Court, Bristol, Avon, England