Venus Williams issued a statement acknowleding the records had been hacked and released.
The with running a state-sponsored doping program from 2011 to 2015.
Williams stated she held a Therapeutic Use Exemption for the medication.
A Russian cyber espionage group hacked the World Anti Doping Agency data base and posted the Williams sisters' medical data online.
The expiration dates for Serena Williams' records show her Therapeutic Use Exemptions range from 2010 to 2015.
In the years since revealing her diagnosis,.