1. Department of Bioengineering, University of Washington, Seattle, Washington 98195, USA
2. AGH University of Science and Technology, Krakow 30059, Poland
3. Faculty of Physics, Moscow State University, Moscow 119991, Russia
4. Department of Chemical Engineering, University of Washington Seattle, Washington 98195, USA
5. Department of Ophthalmology, University of Washington, Seattle, Washington 98104, USA