aHospital Universitario Miguel Servet, IIS Aragón, CIBERCV

bUniversidad de Zaragoza, Zaragoza

cBiofisika Institute (UPV/EHU, CSIC), University of the Basque Country, Leioa

dDepartment of Biochemistry and Molecular Biology, UPV/EHU, University of the Basque Country, Bilbao

eInstituto Aragonés de Ciencias de la Salud (IACS), Zaragoza, Spain

Correspondence to Dr Fernando Civeira, Unidad de Lípidos, Hospital Universitario Miguel Servet, Avda Isabel La Catolica 1-3, 50009 Zaragoza, Spain. Tel: +34 976765500; e-mail: [email protected]