The Effect of Methylphenidate Treatment on Oxidative Stress Levels in Children Diagnosed with Attention-Deficit/Hyperactivity Disorder: An Observational Study. - Altunkılıc EF; Alnak A; Karacetın G; Eroglu Iclı H; Kayan Ocakoglu B; Gurel Fıcıcıoglu IE (Journal of child and adolescent psychopharmacology, 2026)