[1] UNIV VIENNA, DEPT LAB MED, DIV CLIN CHEM, A-1010 VIENNA, AUSTRIA
[2] UNIV VIENNA, DEPT MED 1, KH WR NEUSTADT, A-1010 VIENNA, AUSTRIA
[3] UNIV VIENNA, INST MED STAT, A-1010 VIENNA, AUSTRIA
[4] UNIV VIENNA, DEPT MED 1, DIV HEMATOL & BLOOD COAGULAT, A-1010 VIENNA, AUSTRIA