1. Metabolic Research LaboratoryClínica Universitaria de Navarra
2. Laboratory of BiotechnologyClínica Universitaria de Navarra
3. Department of SurgeryClínica Universitaria de Navarra
4. Laboratory of Proteomics, Genomics and BioinformaticsApplied Medical Research Center, University of Navarra 31008 Pamplona Spain
5. Department of BiochemistryClínica Universitaria de Navarra
6. Department of EndocrinologyClínica Universitaria de Navarra