1. Department of Rectal Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China;, Email: rendl@mail.sysu.edu.cn
2. Department of Rectal Surgery, the First Hospital of Kashgar Prefecture, Kashgar, Xinjiang, China;, Email: rendl@mail.sysu.edu.cn
3. Department of Rectal Surgery, the First Hospital of Kashgar Prefecture, Kashgar, Xinjiang, China
4. Fuyong People's Hospital of Baoan District, Shenzhen, China
5. Department of Rectal Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China