1. Department of Molecular Physiology and Biophysics; Baylor College of Medicine; One Baylor Plaza Houston TX 77030 U.S.
2. Department of Biomedical Engineering; University of Houston; 3605 Cullen Blvd., 77204 Houston TX 77204 U.S.
3. Interdisciplinary Laboratory of Biophotonics; Tomsk State University; Tomsk 634050 Russia