Effects of addition of different doses of clonidine to intrathecal ropivacaine in lower limb and subumbilical surgeries. Int Jour of Biomed Res [Internet]. 2016 Sep. 30 [cited 2024 Oct. 18];7(9):689-94. Available from: https://ssjournals.co.in/index.php/ijbr/article/view/3624