Database: thrombosis_prediction
Question: For the patients with an abnormal activated partial prothrom bin time, how many of them does not have thrombosis?
SQL: SELECT COUNT(DISTINCT T1.ID) FROM Patient AS T1 INNER JOIN Laboratory AS T2 ON T1.ID = T2.ID INNER JOIN Examination AS T3 ON T3.ID = T2.ID WHERE T3.Thrombosis = 0 AND T2.APTT > 45