1. Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
2. Obesity Medical Center, University Hospital Policlinico Tor Vergata, 00133 Rome, Italy
3. Section of Mechanisms, Biomarkers and Models, Department of Environment and Health, Istituto Superiore di Sanità, Viale Regina Elena, 299, 00161 Rome, Italy
4. High Resolution NMR Unit, Core Facilities, Istituto Superiore di Sanità, Viale Regina Elena, 299, 00161 Rome, Italy