The midfielder admitted that getting back to playing for United was crucial in driving him on through surgery and bouts of treatment for his chronic bowel problems.
He said: "There are no guarantees with surgery but the surgeon was very confident that I would get back to a normal life and be a good husband and a good dad, all these factors.
"But deep down as well it was to get back to playing football because that was important as well. Although people will tell you that's the not most important thing, it's always in your mind, no doubt about it.
"I'm very fortunate to be where I am. Surgery has enabled me to be back playing for Manchester United and feeling great.
"That's difficult as well when there's no known cure or reason why you get it. That's difficult to deal with and accept, and that's why we're trying to raise awareness."
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