3. Results
A diagram showed the details of included studies in Figure
1 . A total of 93 recorded were identiļ¬ed initially from selected
databases. After excluding duplicates and articles that did not meet the
inclusion criteria, we obtained 48 articles with full-texts which were
read for further evaluation, where another 27 were excluded due to
insufficient data and duplication. Overall, we included 21 articles for
qualitative analysis.