1. Key Laboratory of Special Function Materials and Structure Design of the Ministry of Education, Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
2. Department of Gastroenterology, Gansu Provincial Hospital, Lanzhou 730000, China
3. The First School of Clinical Medicine, Lanzhou University, Lanzhou 730000, China
4. State Key Laboratory for Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China