1 Shaanxi Provincial Institute for Endemic Disease Control, Xi'an, China; School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China.
2 Department of Orthopedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, China.
3 Shaanxi Provincial Institute for Endemic Disease Control, Xi'an, China. Electronic address: 1016009751@qq.com.
4 Shaanxi Provincial Institute for Endemic Disease Control, Xi'an, China.