Database: thrombosis_prediction
Question: What is the anti-nucleus antibody concentration of the patient whose total bilirubin is the highest in the normal range?
SQL: SELECT T3.ANA FROM Patient AS T1 INNER JOIN Laboratory AS T2 ON T1.ID = T2.ID INNER JOIN Examination AS T3 ON T1.ID = T3.ID WHERE T2.`T-BIL` < 2.0 ORDER BY T2.`T-BIL` DESC LIMIT 1