1. Qingdao Municipal Hospital, Qingdao University. Qingdao 266071, China
2. Department of Biochemistry and Molecular Biology, Basic Medical College, Qingdao University, Qingdao 266071, China
3. Department of Nutrition and Food Hygiene, College of Public Health, Qingdao University, Qingdao 266071, China
4. Qingdao Institute of Food and Drug Inspection, Qingdao 266071, China