NEW ORLEANS (AP) — When the Baltimore Ravens and San Francisco 49ers meet in the Super Bowl on Sunday, two complete seasons will have come and gone without a single HGH test being administered, even though the league and the NFL Players Association paved the way for it in the 10-year collective bargaining agreement they signed in August 2011.

Since then, the sides have haggled over various elements, primarily the union's insistence that it needs more information about the validity of a test that the Olympic sports and Major League Baseball use to detect the banned performance-enhancing drug.

House Oversight and Government Reform Committee chairman Darrell Issa, a California Republican, and ranking Democrat Elijah Cummings of Maryland wrote NFLPA head DeMaurice Smith this week to chastise the union for standing in the way of HGH testing and to warn that they might ask players to testify on Capitol Hill.

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