“…Out of 57 articles reviewed, 22 articles have piloted or pretested the questionnaire [ 24 , 29 , 34 , 36 , 38 , 41 , 48 , 50 , 53 , 57 , 63 , 65 , 66 , 67 , 68 , 71 , 72 , 73 , 75 , 77 , 78 , 79 ] before surveying. A total of 14 articles [ 26 , 30 , 31 , 33 , 35 , 37 , 42 , 43 , 47 , 51 , 54 , 62 , 74 , 80 ] were considered as having a high risk of bias on the questionnaire due to lack of evidence on validity and reliability (data not shown), among which two articles were adapted directly from the similar previous study, and 10 articles were a newly developed questionnaire.…”