1. Department of Chemical Engineering, Stanford University, 381 North-South Mall, Stauffer III, Stanford, California 94305-5025, United States
2. Department of Ophthalmology, Stanford University School of Medicine, 300 Pasteur Drive Stanford, California 94305-5025, United States
3. NIST Center for Neutron Research, National Institute of Standards and Technology,100 Bureau Drive, Gaithersburg, Maryland 20899-6102, United States
4. Department of Chemical Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
5. Stanford Synchrotron Radiation Lightsource, Menlo Park, California 94025-7015, United States