1. Department of Radiology; Affiliated Hospital of Nanjing University of Chinese Medicine; Nanjing 210029 China
2. Department of Nephrology; Zhongshan Hospital Fudan University; Key Laboratory of Kidney and Dialysis Shanghai 200032 China
3. Institute of Radiation Medicine; Fudan University Shanghai 200032 China
4. Department of Occupational Medicine, School of Public Health; Fudan University; Shanghai 200032 China
5. Department of Nutrition and Food Hygiene, School of Public Health; Fudan University; Shanghai 200032 China
6. Institute of Environmental Medicine; Karolinska Institutet 171 77 Stockholm Sweden
7. Department of Public Health and Clinical Medicine; Umeå University; 901 87 Umeå Sweden