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. 2008 Sep 1;90(9):1811–1819. doi: 10.2106/JBJS.G.00913

Fig. 1.

Fig. 1

Spine Patient Outcomes Research Trial (SPORT) intervertebral disc herniation enrollment and randomization. This flow diagram describes the group enrollment. The percentages in the final row of boxes are the percentage of patients seen at the time of the two-year follow-up by the treatment received within two years of enrollment.