A District judge ended a nearly two-decade-old lawsuit by ruling in favor of the University Monday.

The four anesthesiology nurses who alleged that GW submitted false claims for Medicare reimbursements walked away defeated, McClatchy D.C. reported They filed the lawsuit in 1995, as three different judges and two magistrate judges had taken a look at the case over the last 18 years.

The nurses contended that GW told the federal government that a licensed anesthesiologist performed the procedures, but resident physicians and nurses had actually performed parts of them. They claimed the University overcharged Medicare by at least $100 million while physicians were playing computer games, resting in the hospital’s lounge or studying for exams instead of performing the procedures.

The University owns 20 percent of GW Hospital, while a subsidiary of Universal Health Services has owned the rest since 1997.