[1] Ghent Univ Hosp, Lab Expt Canc Res, Dept Radiotherapy & Nucl Med, B-9000 Ghent, Belgium
[2] Ghent Univ Hosp, Dept Dermatol, B-9000 Ghent, Belgium
[3] Ghent Univ Hosp, Dept Hematol, B-9000 Ghent, Belgium
[4] Univ Ghent, Lab Pharmacognosy & Phytochem, B-9000 Ghent, Belgium
[5] Univ Antwerp, Div Pharmacol, B-2610 Antwerp, Belgium
[6] Univ Lille 1, F-59655 Villeneuve Dascq, France