Kazim, M.; Kothari, V.; Priyadarshi, S.; Mistry, T.; Prajapati, R.; Mathur, R. A Comparative Study to Assess the Effect of Dexmedetomidine and Fentanyl As an Adjuvant to Ropivacaine for Epidural Anesthesia in Percutaneous Nephrolithotomy. apic 2019, 59-64.