1. Institute of Biophotonics, National Yang-Ming Chiao Tung University, Taipei 112, Taiwan
2. Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
3. National PET/Cyclotron Center, Nuclear Medicine Department, Taipei Veterans General Hospital, Taipei 112, Taiwan
4. Nano Device Materials Characterization Division, National Nano Device Laboratories, Hsinchu 300, Taiwan
5. Faculty of Allied Health Sciences, Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai 603103, India