Figure 1
The flowchart consists of three rectangular text boxes vertically stacked and arranged from top to bottom. The first box at the top is labeled “PLANNING” and contains the bullet points: “Identifying research aim” and “Developing sampling strategy (search string, electronic databases, exhaustive or selective or purposeful criteria)”. A large downward-pointing arrow connects the first box to the second box. The second box in the middle is labeled “SAMPLING”. It contains the following bullet points: “Searching and gathering studies according to sampling strategy” and “Applying the inclusion and exclusion criteria to get a final sample of studies”. Another large downward-pointing arrow connects the second box to the third box. The third box at the bottom is labeled “ANALYSIS” and contains the following bullet points: “Developing a coding guide”, “Extracting relevant data following the coding guide”, “Analysing each study by descriptive information”, “Identifying trends, gaps and limitations”, and “Presenting findings”.MMRS process. Sources: Adapted from Heyvaert et al. (2017), Nguyen et al. (2020), Alhossini et al. (2021)