1. Key Laboratory of Radiological Protection and Nuclear Emergency , China CDC, , 2 Xinkang Street, Deshengmenwai, Xicheng District, Beijing 100088 , China
2. National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention , China CDC, , 2 Xinkang Street, Deshengmenwai, Xicheng District, Beijing 100088 , China
3. The Third People’s Hospital of Henan Province, Henan Hospital for Occupational Diseases , 3 Kangfu Middle Street, Erqi District, Zhengzhou 450052 , China