“…Study selection was independently assessed by 2 researchers using the eligibility criteria, and the differences were resolved through consult with the third researcher. Relevant data were extracted from the selected studies, including name of first author, year of publication, country, study design, groups with sample sizes, evaluation time, number and percentage of males, mean age, and baseline forced expiratory volume in 1 s to forced vital capacity ratio (FEV 1 /FVC) [ [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] ]. The risk of bias was assessed using the Cochrane Collaboration tool [ 22 ].…”