1. Department of Biobank, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
2. Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
3. Medical Examination Center, Shenyang Red Cross Hospital, Shenyang, Liaoning 110013, P.R. China