[1] Univ Porto IPATIMUP, Inst Mol Pathol & Immunol, Oporto, Portugal
[2] Univ Porto, Fac Med, P-4100 Oporto, Portugal
[3] Univ Coimbra, Fac Med, Coimbra, Portugal
[4] Univ & Hosp Ctr Coimbra, Dept Diabet Endocrinol & Metab, Coimbra, Portugal
[5] Univ Coimbra, Fac Med, Unit Endocrinol, Coimbra, Portugal
[6] Hosp Sao Joao, Dept Endocrinol, Oporto, Portugal
[7] Univ Porto, Fac Med, Dept Pathol & Oncol, P-4100 Oporto, Portugal