1. Department of Polymer Materials Science and Engineering; College of Materials Science and Engineering, Tianjin University; Tianjin 300072 People's Republic of China
2. Research Institute of Advanced Polymer; Tianjin University; Tianjin 300072 People's Republic of China
3. Tianjin Key Laboratory of Composite and Functional Materials; Tianjin University; Tianjin 300072 People's Republic of China
4. Department of Health Statistics; College of Public Health, Tianjin Medical University; Tianjin 300070 People's Republic of China