1. Università della Svizzera italiana, CH-6900 Lugano, Switzerland
2. Institute for Research in Biomedicine, CH-6500 Bellinzona, Switzerland
3. Graduate School for Cellular and Biomedical Sciences, University of Bern, CH-3000 Bern, Switzerland
4. École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland