1. Department of Pathophysiology, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
2. First Department of Internal Medicine, Propaedeutic Clinic, “Laiko” Hospital, National and Kapodistrian University of Athens, 11527 Athens, Greece
3. Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow G12 8QQ, UK