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A 33 year old female presents with right upper quadrant abdominal pain for the past day with vomiting. Her blood work shows mildly elevated AST, ALT, and total bilirubin. On history, she discloses that she has been taking acetaminophen for a rotator cuff injury for a few days, and could not remember how much she has been taking. What stage of acetaminophen poisoning is this patient in?