1. Meta-analysis Interest Group, General Hospital of Shenyang Military Area, Shenyang, Liaoning Province, China
2. Postgraduate College, Jinzhou Medical University, Jinzhou, Liaoning Province, China
3. Section of Medical Service, General Hospital of Shenyang Military Area, Shenyang, Liaoning Province, China
4. Department of Gastroenterology, General Hospital of Shenyang Military Area, Shenyang, Liaoning Province, China