Task: Answer Verification
Input (English): Question: Is the chitinase-like protein YKL-40 a useful biomarker for severe persistent asthma in children?
Answer: Severe persistent asthma in childhood is not associated with elevated YKL-40 levels, unlike in adults with severe persistent asthma. YKL-40 is not a useful biomarker for asthma severity in childhood asthma.
Output (English): no