MORGANTOWN, W. Va. -- West Virginia University hospital officials said Thursday that the lone survivor of the Sago Mine tragedy has been transferred to a Pittsburgh hospital to undergo hyperbaric oxygen treatment.

Randal McCloy Jr., who was in a coma and may have suffered brain damage, was transferred to Allegheny General Hospital, said Bill Case, a spokesman for WVU's Ruby Memorial Hospital.

McCloy, 26, of Simpson, was struggling with the effects of oxygen deprivation to his vital organs, including his brain, Dr. John Prescott had said.

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