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DENVER (AP) _ Jana Elway-Sever, twin sister of former Denver Broncos quarterback John Elway, died Tuesday. She was 42.

Elway-Sever died at Stanford Hospital in Stanford, Calif., hospital spokeswoman Sara Selis said.

Selis said she did not know the cause of death.

The Elways' father, Jack, died April 15, 2001, of an apparent heart attack.