TABLE 1.
Results from keyword search
| Search engine | Date of search | Number of publications retrieved | Number eligible after title screening | Number of abstracts screened | Number full‐text articles screened | Number included for data extraction |
|---|---|---|---|---|---|---|
| PubMed | 6 April 2021 | 220 | 34 | 34 | 11 | 1 |
| Google Scholar | 12 April 2021 | 1220 | 88 | 80 | 31 | 7 |
| EBSCOHost Web (Academic Search Complete, CINAHL Complete, MEDLINE with Full Text, CINAHL with Full Text, ScienceOpen | 17 April 2021 | 304 | 12 | 12 | 8 | 2 |
| WHO global database | 28 April 2021 | 7 | 4 | 3 | 0 | 0 |
| MedRxiv | 30 April 2021 | 308 | 11 | 11 | 11 | 1 |