1. Department of Occupational and Environmental Health, the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health; Fourth Military Medical University; Xi'an China
2. Department of Radiology; General Hospital of Tibet Military Region; Lhasa China
3. Department of Radiology; Xijing Hospital, Fourth Military Medical University; Xi'an China
4. Department of Ultrasound; Xijing Hospital, Fourth Military Medical University; Xi'an China
5. Department of Molecular Pharmacology; Albert Einstein College of Medicine; New York