[1] Univ Dusseldorf, Dept Thorac & Cardiovasc Surg, D-4000 Dusseldorf, Germany
[2] Univ Dusseldorf, Dept Hemostasis & Transfus Med, D-4000 Dusseldorf, Germany
[3] Univ Dusseldorf, Inst Pharmakol & Klin Pharmakol, D-4000 Dusseldorf, Germany
[4] Bundesinst Arzneimittel & Medizinprod, Bonn, Germany