1. 1st Internal Medicine Department, Infectious Diseases Division, AHEPA University Hospital, Medical School, Aristotle University of Thessaloniki - 1 Stilponos Kyriakidi Str, P.O. 54636, Thessaloniki, Greece
2. National AIDS Reference Centre of Northern Greece, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. 1st Internal Medicine Department, Infectious Diseases Division, Medical School, Aristotle University of Thessaloniki, 1, Stilponos Kyriakidi Str., 54636, Thessaloniki, Greece
4. Medical Laboratories, School of Hygiene and Health Care Alexandrion Educational Technological Institute of Thessaloniki, P.O. BOX 141, 57400 Thessaloniki, Greece