Table 1.

Description of the literature reviewed

Type of study	Number of studies	Reference number
Systematic review	5	70–71,75–76,85
Scoping review	1	77
Environmental scan	1	84
Review/overview	6	21,29,86–89
Conceptual/theoretic	30	5–11,13,15,44–62,66–67
Empirical	13	35,39,41,49,94–102
Total	56