50
Participants
Start Date
December 31, 2012
Primary Completion Date
October 31, 2017
Study Completion Date
October 31, 2017
ascorbic acid
ascorbic acid 2g in normal saline 500ml IV start 30min before the operation and infusion for 2 hour
Normal saline
normal saline 500ml IV
Seoul National University Bundang Hospital, Gyeongg-ido
Seoul National University Hospital
OTHER