Acetaminophen Induced Oxidative and Histopathological Alterations in Hepatic Tissue: Protective Effects of Alstonia Scholaris Leaf Extracts, Verma, Pawan Kumar, Raina Rajinder, Sultana Mudasir, Singh Maninder, and Kumar Pawan , Pharmacognosy Journal, June/2016, Volume 8, Issue 4, p.385-391, (2016)