Osama A.E. Ali*, Nabeel A.J.Ali1, Janan G. Hassan2 1MBChB, PhD, Department of Pharmacology, College of Medicine, University of Basrah, Basrah, Iraq 2MBChB,FICMS, Department of Pediatrics, College of Medicine, University of Basrah, Basrah, Iraq A B S T R A C T Background: There are genetic variations in the activity of the enzyme thiopurine methyl transferase (TPMT) which lead to differences ... Read More »