[1] Univ Manchester, Salford Royal NHS Fdn Trust, Dept Endocrinol, Salford, Lancs, England
[2] Tech Univ Dresden, Dept Psychol, Dresden, Germany
[3] Manchester Royal Infirm, Dept Endocrinol, Manchester, Lancs, England
[4] Inst Politecn Nacl, Mexico City, DF, Mexico
[5] Salford Royal NHS Fdn Trust, Clin Biochem, Salford, Lancs, England
[6] Walsall Manor Hosp, Dept Blood Sci, Walsall, W Midlands, England
[7] Salford Royal NHS Fdn Trust, Behav Med, Salford, Lancs, England