Statistical Analysis: Reliability testing will be assessed using kappa and intraclass correlation coefficients. Validity testing of the Pull Test will be performed to determine the sensitivity, specificity, accuracy, negative and positive predictive values for the comparison of Pull Test outcome and the pain and functional changes observed following administration of the AHI CSI. Chi-square (2x2 contingency tables) and odds ratios will then be calculated to evaluate if the outcomes of the Pull Test (binary: positive versus negative) are correlated with successful pain and functional outcome changes following the AHI CSI (successful outcome, Yes versus No) immediately following, at 4- to 7-days following, and at 6-weeks following the AHI CSI.