1. Department of Biomedical Engineering; University of Houston; 3605 Cullen Boulevard Houston Texas 77204 USA
2. Department of Pathology; the University of Chicago; 5841 S. Maryland Avenue Chicago IL 60637 USA
3. Molecular Physiology and Biophysics; Baylor College of Medicine, One Baylor Plaza; Houston Texas 77584 USA
4. Interdisciplinary Laboratory of Biophotonics; Tomsk State University; Tomsk 634050 Russia