| Authors: |
Li R; Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou, Gansu, China., Li Z; Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou, Gansu, China., Ma H; Lanzhou Maternal and Child Health Hospital, Lanzhou, Gansu, China., Li D; Gansu Provincial Maternity and Child Care Hospital (Gansu Provincial Centre Hospital), Lanzhou, Gansu, China., Yue X; Gansu Provincial Maternity and Child Care Hospital (Gansu Provincial Centre Hospital), Lanzhou, Gansu, China., Zhang X; Gansu Provincial Center for Disease Control and Prevention, Lanzhou, Gansu, China., Wang T; Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou, Gansu, China., Zou Z; Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou, Gansu, China., Shi T; Department of Epidemiology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China., Ren X; Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou, Gansu, China. Electronic address: renxw@lzu.edu.cn. |
