Table 2.
Distribution of publication types.
| Publication type | Number of studies | Percentage |
|---|---|---|
| Journal articles | 21 | 87.5% |
| Conference proceedings | 3 | 12.5% |
| Total | 24 | 100% |
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.