[1] Hosp Clin Barcelona, Serv Endocrinol, Unitat Lipids, Barcelona, Spain
[2] Hosp Clin Barcelona, IDIBAPS, Ctr Diagnost Imatge, Seccio Ecog, Barcelona, Spain
[3] Univ Zaragoza, Dept Bioquim Mol & Celular, E-50009 Zaragoza, Spain
[4] Hosp Univ Miguel Servet, Zaragoza, Spain
[5] Hosp Donostia San Sebastian, Serv Radiol, San Sebastian, Spain