[Guo, Yajie] Sun Yat Sen Univ, Affiliated Hosp 8, Dept Emergency, Shenzhen, Peoples R China.
[Sang, Dan] Sun Yat Sen Univ, Affiliated Hosp 8, Dept Endocrinol, Shenzhen, Peoples R China.
[Guo, Bin] Univ Sci & Technol China, Affiliated Hosp 1, Ultrason Dept, Div Life Sci & Med, Hefei, Anhui, Peoples R China.
[Wang, Dan] Southern Med Univ, Sch Publ Hlth, Guangzhou, Peoples R China.
[Wang, Dan; Xu, Xinyue] Shenzhen Ctr Dis Control & Prevent, Shenzhen, Peoples R China.