1. Department of Stomatology, The First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang 154002, P.R. China
2. Department of Cardiothoracic Vascular Surgery, Affiliated Hospital of Beihua University, Jilin City, Jilin 132000, P.R. China
3. Division of Vascular Surgery, The First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang 154002, P.R. China
4. Department of Surgery, First Affiliated Hospital, China Medical University, Shenyang, Liaoning 110000, P.R. China
5. Department of Emergency, Affiliated Hospital of Beihua University, Jilin City, Jilin 132000, P.R. China