[1] Natl Yang Ming Univ, Inst Biophoton, Taipei 11221, Taiwan
[2] Manipal Univ, Sch Life Sci, Dept Biophys, Manipal 576104, Karnataka, India
[3] Huazhong Univ Sci & Technol, Key Lab Biomed Photon, Wuhan, Hubei, Peoples R China
[4] Ist Italiano Tecnol, Nanoscopy, Via Morego 30, I-16163 Genoa, Italy