Table 2.
Legends for B1 to B20.
| Altmetric indicators | Legends |
| B1 | Citations recorded by CrossRef |
| B2 | Citations recorded by PubMed Central |
| B3 | Citations recorded by Scopus |
| B4 | Total HTML page views |
| B5 | Total PDF downloads |
| B6 | Total XML downloads |
| B7 | Combined usage (HTML + PDF + XML) |
| B8 | Blog postings indexed by Nature Blogs |
| B9 | Blog postings indexed by Bloglines |
| B10 | Blog postings indexed by ResearchBlogging.org |
| B11 | Trackbacks made by external sites |
| B12 | Social bookmarking made by users of CiteULike |
| B13 | Social bookmarking made by users of Connotea |
| B14 | Ratings on PLOS website |
| B15 | Average rating that the article has received |
| B16 | Note threads started on the article |
| B17 | Replies to Note thread |
| B18 | Comment threads started on the article |
| B19 | Replies to Comment threads |
| B20 | “Star Ratings” including a text comment |