Figure 1: Diagram summarizing literature searches: FBSS management. The electronic and hand literature searches yielded 424 titles. Following a review of full-text versions of the 177 (NN) + 16 (GB) residual publications, after discarding duplicates and initial exclusion of 231 titles/abstracts, 95 (NN) + 16 (GB) papers were finally selected and 6 were retained. These are presented in Table 1.