1. Second Department of Internal Medicine, Hippokration General Hospital, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece
2. Department of Internal Medicine, Evangelismos General Hospital, 10676 Athens, Greece
3. Hematology Unit, Second Department of Internal Medicine, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece
4. Roche Diagnostics Hellas S.A., 15125 Athens, Greece
5. Department of Endocrinology and Metabolism, Evangelismos General Hospital, 10676 Athens, Greece
6. Second Department of Critical Care, Attikon General University Hospital, Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
7. Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece