[1] Aristotle Univ Thessaloniki, Hippokrat Hosp, Dept Internal Med 2, Clin Immunol Lab, Thessaloniki 54642, Greece
[2] Aristotle Univ Thessaloniki, Dept Math, Sect Stat Probabil & OR, GR-54006 Thessaloniki, Greece
[3] Hop La Pitie Salpetriere, INSERM, UR543, Lab Cent Immunol Cellulaire & Tissulaire, Paris, France