1. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
2. Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
3. Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
4. Department of Chemical and Biomolecular Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
5. Departamento de Física, Universidad San Francisco de Quito, Quito 170901, Ecuador
6. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, P. R. China