Comparison of ultrasound and fluoroscopy-guided caudal epidural block in low back pain with radiculopathy: A randomized controlled study. - Goel, Shrey; Mitra, Sukanya; Singh, Jasveer; Jindal, Swati; Upadhyay, Prateek; Jindal, Rohit (Journal of Anaesthesiology Clinical Pharmacology, 2025)