Nafea, O.E., ElKhishin, I.A., Awad, O.A. and Mohamed, D.A. 2016. A study of the neurotoxic effects of tramadol and cannabis in adolescent male albino rats. International Journal of Scientific Reports. 2, 7 (Jul. 2016), 143–154. DOI:https://doi.org/10.18203/issn.2454-2156.IntJSciRep20162164.