1 Angiogenesis Laboratory, Department of Medical Oncology, Vrije Universiteit Medical Center, 1081 HZ Amsterdam, The Netherlands.
2 Van't Hoff Institute of Molecular Sciences, University of Amsterdam, 1098 HX Amsterdam, The Netherlands; p.timmerman@pepscan.com aw.griffioen@vumc.nl.
3 Pepscan Therapeutics BV, 8243 RC Lelystad, The Netherlands.
4 Angiogenesis Laboratory, Department of Medical Oncology, Vrije Universiteit Medical Center, 1081 HZ Amsterdam, The Netherlands; p.timmerman@pepscan.com aw.griffioen@vumc.nl.