319
Participants
Start Date
January 31, 2017
Primary Completion Date
March 31, 2020
Study Completion Date
April 30, 2020
Early drain removal
Removing drain(s) on postoperative day 3
Late drain removal
Removing drain(s) on postoperative day 5 or later
Peking Union Medical College Hospital, Beijing
Peking University First Hospital
OTHER
Chinese PLA General Hospital
OTHER
Xuanwu Hospital, Beijing
OTHER
Beijing Chao Yang Hospital
OTHER
Beijing Tongren Hospital
OTHER
Chinese Academy of Medical Sciences
OTHER
Peking Union Medical College Hospital
OTHER