1. Center for Photonics Science and Engineering Skolkovo Institute of Science and Technology Bolshoy Boulevard 30, Building 1 Moscow 121205 Russia
2. Institute for Biomedical Engineering and Institute of Pharmacology and Toxicology, Faculty of Medicine University of Zürich Winterthurerstrasse 190 Zurich 8057 Switzerland
3. Institute for Biomedical Engineering Department of Information Technology and Electrical Engineering ETH Zürich, Rämistrasse 101 Zurich 8093 Switzerland
4. Department of Medical Imaging Shanxi Medical University Taiyuan 030001 China
5. Department of Materials Science Fudan University Shanghai 200433 China