Pengaruh pemberian N-Asetil Sistein terhadap profil kadar oksidan, enzim transaminase, dan bilirubin pada anak dengan leukemia limfoblastik akut dalam kemoterapi fase induksi: uji klinis acak penyamaran tunggal = Effect of N-Acetylcysteine on level of oxidant pProfile, transaminase enzyme, and bilirubin level among children with acute lymphoblastic leukemia undergoing induction phase chemotherapy: single blind randomized clinical trial