Rajkumar, Suresh, Senthil M, and V Ezhilrajan. 2016. “The Efficacy of Intravenous Clonidine Premedication to Reduce Surgical Area Bleeding in Posterior Lumbar Spine Fusion Surgery”. International Journal of Medical Research and Review 4 (3), 361-67. https://doi.org/10.17511/ijmrr.2016.i03.13.