1. Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, United States
2. Currently with Molecular Analytics and Photonics (MAP) Laboratory, Department of Textile Engineering, Chemistry and Science, North Carolina State University, Raleigh, North Carolina 27606, United States
3. Department of Molecular Biosciences, Northwestern University, Evanston, Illinois 60208, United States
4. Department of Dermatology, Northwestern University, Chicago, Illinois 60611, United States
5. Department of Mechanical Engineering, Northwestern University, Evanston, Illinois 60208, United States