After coming off of the embarrassing and aggravating loss to the Packers the week before, the Cowboys managed to hold the Redskins to only two field goals to lead 14-6 at halftime. In the third quarter, Kirk Cousins threw two touchdown passes to give the Redskins a 20-14 lead at the end of the 3rd. The Cowboys, in an attempt to not repeat the mistakes of the previous week, sent Dan Bailey out to kick a field goal to trail 17-20 early in the 4th. The Redskins extended their lead to 23-17 after another field goal. At the 3:29 mark, the Cowboys went back to work to start at their own 13 yard line. Romo led the Cowboys downfield thanks in large part to a Terrance Williams 51 yard catch and then a Dez Bryant catch and run for 17 yards to set up first and goal at the Redskins' 4 yard line. DeMarco Murray carried the ball for all three plays (+3, no gain, -9). Facing 4th and goal at the Washington 10 yard line,  Tony Romo climbed the pocket and fired a pass to DeMarco Murray in the end zone to tie the game 23-23. With the extra point good, the Cowboys led 24-23 with 1:01 remaining in the game. Washington started their drive on their own 13 yard line after a 10-yard illegal block penalty negated what would have been a 21-yard return (to the WAS 23). Kirk Cousins and co. could not sustain their drive, totaling 4 yards on four passing attempts. The Redskins turned the ball over on downs with 40 seconds remaining in the game. Lining up in the victory formation, Tony Romo was able to kneel the ball down and run the clock out. With the win, the Cowboys advanced to 5-0 in the NFC East and kept their playoff hopes alive to set up a do-or-die at home versus the Eagles. Romo was seen limping through most of the fourth quarter after rolling out of what would have been a sack by Redskins linebacker Rob Jackson. The Cowboys later confirmed injury reports of Romo suffering a herniated disc in his lower back. Despite statements that he will be ready to face Nick Foles and the Philadelphia Eagles for the NFC East Championship, Romo was placed on Injured Reserve. The Cowboys tried to delay surgery by administering an epidural injection two days prior to the anticipated game, but it was decided Romo needed the surgery and ended his season.
Question: What did they do to try and delay surgery for Romo?
Answer: an epidural injection