[1] Univ Nijmegen, Med Ctr St Radboud, Dept Med, NL-6500 HB Nijmegen, Netherlands
[2] Univ Nijmegen, Med Ctr St Radboud, Dept Tumor Immunol, NL-6500 HB Nijmegen, Netherlands
[3] Univ Nijmegen, Med Ctr St Radboud, Dept Pathol, NL-6500 HB Nijmegen, Netherlands
[4] Univ Nijmegen, Ctr Infect Dis, NL-6500 HB Nijmegen, Netherlands
[5] Univ Konstanz, Dept Biochem Pharmacol, D-7750 Constance, Germany