Institute of Fluid Dynamics, ETH Zurich, Sonneggstrasse 3, Zurich, Switzerland.|Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, Zurich, Switzerland.|ARTORG Center for Biomedical Engineering Research, University of Bern, Murtenstrasse 50, Bern, Switzerland.|Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, Zurich, Switzerland.|Institute of Fluid Dynamics, ETH Zurich, Sonneggstrasse 3, Zurich, Switzerland.