Munjupong, S., Malaithong, W., Udomsakdi, N. and Tontisirin, N. (2017) “Comparison of Epidural Steroid Injection between L5-S1 Retrodiscal Technique and S1 Transforaminal Technique in L5-S1 Spinal Stenosis with S1 Radicular Pain”, The Bangkok Medical Journal, 13(1), p. 31. doi: 10.31524/bkkmedj.2017.02.004.