Table 1.
Distribution of content types for literature corpus.
| Content type | Count | Percentage |
|---|---|---|
| PubMed abstract | 384,628 | 67.8% |
| Elsevier | 81,567 | 14.4% |
| PMC open access | 74,654 | 13.2% |
| PMC author's manuscript | 25,950 | 4.6% |
| Missing | 707 | 0.1% |
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.