Double Olympic triathlon champion Alistair Brownlee has become the latest Great Britain athlete to have medical documents made public by hackers.
Files show that the 28-year-old was given a therapeutic use exemption (TUE) for the drug acetazolamide, more commonly known as Diamox, which helps glaucoma and altitude sickness.
"I have had one TUE in my career in October 2013 for Diamox to treat altitude sickness while climbing Kilimanjaro," Brownlee said on his official Twitter account.
"Slightly embarrassing that someone as fit as me suffered from altitude sickness but thankfully [brother Jonathan] was there to carry me."
A TUE allows an athlete, for medical reasons, to take a prescribed substance or have treatment that is otherwise prohibited.
