Of the patients with an abnormal level of anti-DNA-II, how many of them admitted to the hospital?
normal level of anti-DNA-II refers to DNA-II < 8; admitted to the hospital refers to Admission = '+';
SELECT COUNT(T1.ID) FROM Patient AS T1 INNER JOIN Laboratory AS T2 ON T1.ID = T2.ID WHERE T2.`DNA-II` >= 8 AND T1.Admission = '+'