Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.|Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.|Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.|Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.|Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.|Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.