1. Institute for Molecular Biology and Biophysics, Department of Biology, Swiss Federal Institute of Technology, Zürich, ETH-Hönggerberg, CH-8093 Zürich, Switzerland.
2. Department of Microbiology, Immunology, and Molecular Genetics and Howard Hughes Medical Institute, University of California Los Angeles, Los Angeles, CA 90095, USA.
3. Laboratory of Nucleic Acid Chemistry LCAN-EPFL, Lausanne, Switzerland.
4. Molecular Life Science Ph.D. Program, Zürich, Switzerland.