1. Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou, Lanzhou, Gansu Province, China
2. Gansu Provincial Academic for Medical Research, Gansu Provincial Cancer Hospital, Lanzhou, Gansu Province, PR China
3. Radiology Department of Gansu Provincial Hospital, Lanzhou, Gansu Province, PR China