Rustagi, P.; Patkar, G. A.; Malpani, Y.; Tendolkar, B. A. Clonidine As an Adjuvant to Local Anesthetic in Supraclavicular Brachial Plexus Block: A Randomized, Double Blinded Placebo Controlled Study. Int J Basic Clin Pharmacol 2017, 5, 1892-1897.