“…Adequate randomization and treatment allocation, and blinding were not achieved in any of the included studies. Standardization of treatment and outcome measures were achieved in 19 (11,13,(16)(17)(18)20,21,24,(27)(28)(29)(30)32,33,35,(38)(39)(40)(41) and 26 (2,4,5,11,13,(16)(17)(18)(19)(20)(21)(22)24,25,(29)(30)(31)(32)(33)(34)(35)37,38,40,41) of all studies, respectively. In 13 studies (3,4,11,12,(14)(15)…”