4Hoogland T, Schubert M, Miklitz B,et al. Transforaminal posterolater- al endoscopic discectomy with or without the combination of a low - dose chymopapain : a prospective randomized study in 280 consecutive cases [ J ]. Spine,2006,31 (24) :890 - 897.
5MacNab I. Negative disc exploration: an analysis of the causes of nerve - root involvement in sixty - eight patients [J]. J Bone Joint Surg Am,1971,53(5) :891 -903.
8Ramsay CR, Grant AM, Wallace SA, et al. Assessment of the learning curve in health technologies [ J ]. Int J Technol Assess Health Care, 2000,16(4) :1095 - 1108.
9Chaichankul C, Poopitaya S, Tassanawipas W. The effect of learning curve on the results of percutaneous transforaminal endoscopic lumbar discectomy[J]. J Med Assoc Thai, 2012,95 ( Suppl 10 ) : $206 - 212.
10Zacchino M, Almolla J, Canepari E, et al. Use of ultrasound - magnet- ie resonance image fusion to guide sacroiliac joint injections:a pre- liminary assessment [ J ]. J Ultrasound,2013,16 (3) : 111 - 118.
