Lipid Unit, Hospital Universitario Miguel Servet, IIS Aragon, CIBERCV, Zaragoza, Spain; Universidad de Zaragoza, Zaragoza, Spain. Hematology Department, Hospital Universitario Miguel Servet, Zaragoza, Spain. Lipid Unit, Hospital Universitario Miguel Servet, IIS Aragon, CIBERCV, Zaragoza, Spain. Universidad de Zaragoza, Zaragoza, Spain; Hematology Department, Hospital Universitario Miguel Servet, Zaragoza, Spain. Biochemistry Department, Hospital Universitario Miguel Servet, Zaragoza, Spain. Lipid Unit, Hospital Universitario Miguel Servet, IIS Aragon, CIBERCV, Zaragoza, Spain; Universidad de Zaragoza, Zaragoza, Spain. Electronic address: civeira@unizar.es.