1. Research-Education Institute of Optics and Biophotonics; Saratov National Research State University; Astrakhanskaya 83 410012 Saratov Russian Federation
2. Center of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venerology and Allergology; Charité - Universitätsmedizin Berlin; Charitéplatz 1 10117 Berlin Germany
3. Laboratory of Laser Diagnostics of Technical and Living Systems; Institute of Precision Mechanics and Control RAS; Rabochaya 24 410028 Saratov Russian Federation
4. Interdisciplinary Laboratory of Biophotonics; National Research Tomsk State University; Lenin's av. 36 634050 Tomsk Russian Federation