[1] City Univ Hong Kong, COSDAF, Kowloon, Hong Kong, Peoples R China
[2] City Univ Hong Kong, Dept Biol & Chem, 83 Tat Chee Ave, Kowloon, Hong Kong, Peoples R China
[3] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
[4] City Univ Hong Kong, Shenzhen Res Inst, 8 Yuexing First Rd,Shenzhen Hitech Ind Pk, Shenzhen, Peoples R China