1. Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering and Department of Electrical Engineering California Institute of Technology Pasadena CA 91125 USA
2. Medicum, Faculty of Medicine University of Helsinki Helsinki 00290 Finland
3. Department of Anatomy and Structural Biology and Gruss‐Lipper Biophotonics Center Albert Einstein College of Medicine Bronx NY 10461 USA
4. Science Center for Genetics and Life Sciences Sirius University of Science and Technology Sochi 354340 Russia