1. Laboratory of Biophysics, Wageningen University, P.O. Box 8128, 6700 ET, Wageningen,
The Netherlands
2. Biophysics
Group, Department
of Physics and Astronomy, Faculty of Sciences, VU University, DeBoelelaan1081, 1081 HV Amsterdam, The Netherlands
3. MicroSpectroscopy Centre, Wageningen University, P.O. Box 8128, 6700 ET, Wageningen,
The Netherlands