Table 3.
Uniquely identified publications in terms of DOI and Pubmed ID
| Variables | Removal of duplicate documents | Unique documents |
|---|---|---|
| DOI | Scopus ∪ WoS ∪ PM ∪ PMC—(Scopus ∩ WoS ∩ PM ∩ PMC) | 647 |
| Pubmed ID | Scopus ∪ WoS ∪ PM ∪ PMC—(Scopus ∩ WoS ∩ PM ∩ PMC) | 9 |
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.