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Description of included studies
| Variables | N (%) |
|---|---|
| Publication Type | |
| Journal article | 9 (64) |
| Published standards | 5 (36) |
| Publication date | |
| Until 2010 | 7 (50) |
| 2010–2022 | 7 (50) |
| Country: | |
| USA | 8(57.1) |
| Australia | 2(14.3) |
| India | 1(7.15) |
| Iran | 1(7.15) |
| Republic Korea | 1(7.15) |
| UK | 1(7.15) |
