Figure 1.
The flow diagram presents five stages, search, select, screening, screening, and reading. The search stage lists keywords, subject area, and language, with n equal to 380. The select stage lists document type and source type, with n equal to 248. The first screening stage lists journal ranking, Q 1 and Q 2, with n equal to 203. The second screening stage lists title, keywords, and abstract, with n equal to 115. The reading stage lists full paper and ends with n equal to 78.Paper selection process