1. Department of Electrical Engineering (ESAT), Faculty of Engineering, Katholieke Universiteit Leuven, B–3001 Heverlee, Belgium (J.A., S.D., Y.M.); Department of Plant Systems Biology, Flanders Interuniversity Institute for Biotechnology (VIB), Ghent University, B–9052 Gent, Belgium (R.V., P.A., M.V., P.H., M.T.R.K.); VIB MicroArray Facility, Campus Gasthuisberg, B–3000 Leuven, Belgium (R.M., K.S.,