Template—summary table for yield
| Database | Initial yield | After level 1 screening | After level 2 screening |
| Bibliographic databases | |||
| DB 1—Engineering Village | |||
| DB 2—Web of Science | |||
| DB 3—CINAHL | |||
| DB 4—MEDLINE | |||
| DB 5—HealthStar | |||
| Total | |||
| Duplicates removed | |||
| Number of references from databases | |||
| Manual Identification | |||
| Google Scholar | |||
| Number from Google Scholar removed after initial scan | |||
| Duplicates of bibliographic databases removed | |||
| Number of references from Google Scholar for screening | |||
| Manual search of reference lists | |||
| Number from manual search of reference lists | |||
| Duplicates of bibliographic databases and Google Scholar removed | |||
| Number of references from reference lists for screening | |||
| Grand total |