Rajkumar, S., M, S. and Ezhilrajan, V. 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 (Mar. 2016), 361-367. DOI:https://doi.org/10.17511/ijmrr.2016.i03.13.