1. Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15771, Greece
2. Center of Basic Research, Biomedical Research Foundation of the Academy of Athens, Athens 11527, Greece
3. Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
4. Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States