[1] Southern Med Univ, Dept Healthcare, Affiliated Shenzhen Matern & Child Healthcare Hos, Shenzhen, Guangdong, Peoples R China
[2] Southern Med Univ, Dept Epidemiol, Sch Publ Hlth, Guangzhou, Guangdong, Peoples R China
[3] Shenzhen Ctr Dis Control & Prevent, Dept Informat Technol, Shenzhen, Guangdong, Peoples R China