1. Leibniz Institute of Photonic Technology Jena e.V., Albert-Einstein-Strasse 9, 07745 Jena, Germany
2. Department of Biomedical Engineering, University of California Davis, One Shields Avenue, Davis, California 95616, United States
3. Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota 55905, United States
4. Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany