“…Using the modified Downs and Black scale and our assignment of quality, one study was considered excellent (Crossley et al, ), three were considered good (Deyle et al, , ; Dwyer et al, ), one was considered fair (Kappetijn, van Trijffel, & Lucas, ) and seven were considered poor (Joshi et al, ; Ko, Lee, & Lee, ; Lalit et al, ; Narang & Ganvir, ; Pollard, Ward, Hoskins, & Hardy, ; Razek & Shenouda, ; Singh, ). There were a number of problem items that were either not present or unable to be determined within studies, including item 9: Characteristics of patients lost to follow up ; item 16: Data dredging ; item 17: Did the analyses adjust for different lengths of follow up ?…”