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MESH: Medical Subject Headings
| Search engine | Search strategy | Papers identified | Picking relevant titles | Post-scanning relevant abstract | Post quality check |
| PubMed | MESH | 125 | 48 | 26 | 13 |
| PubMed | Regular (systematic review) | 211 | 45 | 8 | 3 |
| Google Scholar | Advanced search | 666 | 3 | 0 | 0 |
| Total | 1002 | 96 | 37 | 16 | |
