1. Department of General Surgery, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
2. Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
3. Clinical Laboratory of Integrative Medicine, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China