1. Institute of Biochemistry, Department of Biology, ETH Zurich (ETHZ), CH-8093 Zurich, Switzerland.
2. Systems Biology Graduate School PhD Program, ETHZ and University of Zurich, CH-8093 Zurich, Switzerland.
3. Institute of Molecular Systems Biology, Department of Biology, ETHZ, CH-8093 Zurich, Switzerland.
4. Institute of Molecular Life Sciences and Swiss Institute of Bioinformatics, University of Zurich, CH-8057 Zurich, Switzerland.