1. Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, P.O. Box 80082, NL-3508 TB Utrecht, The Netherlands
2. Department of Biochemistry and the Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
3. Department of Biochemistry, Molecular Biology & Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
4. Angiogenesis Laboratory, Amsterdam University Medical Center, location VUMC, Cancer Center Amsterdam, Amsterdam, The Netherlands