Liver histopathology
Kaoud, H. A., M. H. Hellal, F. M. Malhat, S. Saeid, I. A. Elmawella, and A. H. Khali,
"Effects of Acute Sub-lethal Dose of Tramadol on $\alpha$2-Adreergic Receptors and Liver Histopathology in Rat",
Global Journal of Current Research Kaoud et. al, vol. 1, issue 2, no. 2, pp. 70-76, 2013.
Abstract