Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Search strategy.
| Database | Discipline | Records |
|---|---|---|
| JSTOR | Multidisciplinary | 109 |
| EBSCOhost (MEDLINE) | Medicine | 366 |
| PubMed | Medicine | 504 |
| Cochrane | Medicine | 1 |
| Web of Science | Multidisciplinary | 321 |
| Scopus | Multidisciplinary | 711 |
| ACM DL | Computing | 39 |
| Total | 2,975 | |
| Total (without duplicates) | 1,218 | |
