Doctors say the vital signs of chimp attack victim Charla Nash have stabilized, but she still remains in critical condition.

Doctors say Nash has been transfered to the Cleveland Clinic, which two months ago performed the nation's first face transplant.

Nash, 55, was brutally attacked by the escaped chimp on Monday and suffered severe wounds to her face and hands. The chimp's owner, Sandra Herold, stabbed the animal in an attempt to stop the attack. The 14-year-old chimp, named Travis, was later shot and killed by police.

Four teams of surgeons spent seven hours operating on Nash after the attack.

"The patient, Charla, received extensive facial and bilateral hand injuries which required four teams of surgeons operating," says Dr. Kevin Miller, of Stamford Hospital.

Nash's twin brother, Mike, says he's grateful for the outpouring of support the family has received.

"It should be known that people who were complete strangers to us prior to this have selflessly offered their assistance to our family and we are eternally grateful to them," says Mike Nash.

Animal control officer says there were warning before chimp attack

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Listen to the 911 tape