Kumfu, S., Thammachai, A., Parasin, N., Poncumhak, P., Srithawong, A., Tapanya, W., Seeharach, K. and Manoi, P. 2018. A Comparison Study between the Effects of Thai Herbal Steam and Conventional Steam on Pain Scale, Back and Leg Flexibility in Person with Low Back Pain. Srinagarind Medical Journal. 33, 1 (Feb. 2018), 64–70.