1 Department of General Surgery, 425 Hospital of People's Liberation Army, Sanya, Hainan 572008, China; Department of General Surgery, 323 Hospital of People's Liberation Army, Xi'an, Shaanxi 710054, China.
2 Department of General Surgery, 425 Hospital of People's Liberation Army, Sanya, Hainan 572008, China. Email: 1476669205@qq.com.
3 Department of General Surgery, 425 Hospital of People's Liberation Army, Sanya, Hainan 572008, China.