Thakur, A., Sood, P., Rana, S., & Kumar, S. (2017). Open reduction and internal fixation of fracture femur in a patient with severe ankylosing spondylitis utilizing continuous caudal epidural anaesthesia. International Journal of Research in Medical Sciences, 5(5), 2240–2242. https://doi.org/10.18203/2320-6012.ijrms20171877