The RDQ scores in the two groups will be compared using the Student's T Test. Analysis of co-variance will be used if necessary to adjust for a difference in baseline functional status using baseline RDQ scores as a co-variate. Time to return to work will be compared using Kaplan Meier survival analysis. A between group comparison of survival will be performed using the log-rank test. SF 36 scores will be normalized and the Bodily Pain" and Physical Functioning scales will be compared between the EBC and UC groups, again using an unpaired t-test and if necessary, analysis of covariance. Estimated sample size: 88 subjects are required based on a two-sided independent T Test. Power + 0.80, alpha + 0.05, mean difference + 3 points, standard deviation + 4.4 and allowing 25% for loss to follow-up.