This study doesn't follow the usual testing phases β it may be an observational study or a different type of research.
Trial locations(16 sites)
China
Department of General Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, Beijing Municipality
Department of General Surgery, Daping Hospital, Army Medical university, Chongqing, Chongqing Municipality
Department of colorectal surgery, the Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong
Nanfang Hospital, Guangzhou, Guangdong
The Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong