ABC Report: Sister's DNA From Mass. General Helped Confirm bin Laden Death

WCVB TV reports here:

BOSTON — The death of a sister of Osama bin Laden at Massachusetts General Hospital allowed the United States to confirm bin Laden's death, ABC News reported.
When his sister died in Boston, tissue from her body was taken by government officials for DNA testing, ABC News correspondent Brian Ross reported.
That tissue sample was used to match the DNA found on the man killed by special forces troops who conducted the raid on bin Laden's Pakistani compound.
Officials said bin Laden's identity was confirmed through DNA testing.

A Massachusetts General spokesperson says that the hospital has checked with multiple sources there and has been unable to confirm any aspect of the ABC report.