Task: Answer Verification
Input (English): Question: Do antiphospholipid antibodies correlate with stroke severity and outcome in patients with antiphospholipid syndrome?
Answer: In young stroke patients with APS, serum levels of IgM aCL within 48 h are correlated with stroke severity and levels of IgG anti-β2GPI within 48 h are correlated with three-month outcomes.
Output (English): yes