[Rang, Weiqing; Shi, Xiaofei; Long, Dingxin; Zhao, Lin] Univ South China, Sch Publ Hlth, Hengyang 421001, Peoples R China.
[Shi, Xiaofei; Zhao, Lin; Chen, Chunying; Bai, Ru; Chen, Rui; Huo, Lingling] Natl Ctr Nanosci & Technol China, CAS Key Lab Biomed Effects Nanomat & Nanosafety, Beijing 100190, Peoples R China.
[Pui, David Y. H.] Univ Minnesota, Coll Sci & Engn, Dept Mech Engn, Minneapolis, MN 55455 USA.
[Rang, Weiqing] Univ South China, Sch Publ Hlth, 28 Changshengxilu, Hengyang 421001, Peoples R China.