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In page Cerebral hypoxia:
"If hypoxia results in coma, the length of unconsciousness is often indicative of long-term damage. In some cases coma can allow the brain to heal and regenerate,[2] but, in general, the longer a coma, the greater the likelihood that the person will remain in a vegetative state until death.[3] Even if the patient wakes up, brain damage is likely to be significant enough to prevent a return to normal functioning.[citation needed]
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