“…There were no randomised trials and all studies were observational and generally of low quality. Only one study was prospective [11] with the remaining 57 being retrospective [1,2,3,5,8,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62]. Twenty studies made direct comparisons between conservative and surgical management [5,11,12,13,15,19,20,21,25,31,36,38,39,40,42,43,47,51,55,59].…”