“…We searched for ongoing studies but could not find them. Of the 27 trials analysis, 19 evaluated the outcome of the disappearance of subjective symptoms [ 8 , 10 , 11 , 22 – 26 , 28 , 29 , 32 , 34 , 36 – 39 , 41 – 43 ], 16 evaluated the outcome of negative findings [ 8 , 10 , 22 , 24 , 26 – 28 , 30 , 31 , 33 , 35 – 38 , 41 , 42 ], 2 evaluated the outcome of the disappearance of objective symptoms [ 8 , 23 ], 1 evaluated the outcome of all adverse events [ 42 ], 6 evaluated the outcome of DHI-S (the screening version of DHI) [ 9 , 25 , 30 , 31 , 33 , 40 ], and 1 evaluated the outcome of DHI [ 35 ]. For three of the studies that evaluated DHI-S [ 25 , 30 , 31 ], we were unable to retrieve outcome data because no reply was received from the authors.…”