[1] Med Univ Vienna, Vienna Gen Hosp, Div Immunopathol, Dept Pathophysiol, Waehringer Guertel 18-20, A-1090 Vienna, Austria
[2] Med Univ Vienna, Vienna Gen Hosp, Dept Internal Med 1, Div Hematol & Hemostaseol, Vienna, Austria
[3] Univ Marburg, Dept Clin Chem & Mol Diagnost, Marburg, Germany