1 1st Department of Internal Medicine, Korgialenio-Benakio, Red Cross General Hospital, Athens, Greece; National and Kapodistrian University of Athens, Medical School, Athens, Greece. Electronic address: michgiannis@gmail.com.
2 1st Department of Internal Medicine, Korgialenio-Benakio, Red Cross General Hospital, Athens, Greece.
3 Department of Internal Medicine, General Hospital of Rethymno, Rethymno, Greece.