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Geographic distribution of the RCTs and non-experimental studies included in the literature review
| COUNTRY OF STUDY | NO. OF STUDIES |
|---|---|
| Australia26,47,53 | 3 |
| Cameroon50 | 1 |
| Canada28,38,42,44 | 4 |
| Finland7,21 | 2 |
| France24 | 1 |
| Italy18 | 1 |
| Mexio19,34 | 2 |
| Netherlands14,16,23,43,49 | 5 |
| Sweden22,25 | 2 |
| Taiwan33,45 | 2 |
| Thailand32 | 1 |
| UK13,15,20,27,35,39 | 6 |
| US4,17,29,36,37,40,41,46,48,51,52 | 11 |
RCT—randomized controlled trial, UK—United Kingdom, US—United States.
