1. 1st Internal Medicine Department, Laiko General Hospital, National and Kapodistrian University of Athens, Agiou Thoma 17, Goudi, Athens, Greece
2. Fourth Department of Medicine, Attikon General Hospital, National and Kapodistrian University of Athens, Athens, Greece
3. First Department of Medicine, Laiko General Hospital, National and Kapodistrian University of Athens, Athens, Greece
4. Department of Hygiene Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
5. Department of Pharmacy, Laiko General Hospital, Athens, Greece