oaDOI/unpaywall (OA fulltext)
Crossref Metadata (via API)
Worldcat
SHERPA/RoMEO (journal policies)
wikidata.org
CORE.ac.uk
Semantic Scholar
Google Scholar
Abstracts
release_opsbfptueree3pqkxvndztrn24
Archived Files and Locations
application/pdf 3.1 MB
file_jhwk2bmj4jdsdihsyvcbva2xba
|
web.archive.org (webarchive) ard.bmj.com (web) |
application/pdf 3.1 MB
file_3jk25fwz3vauzo22uwidnteebe
|
web.archive.org (webarchive) ard.bmj.com (web) |
Read Archived PDF
Preserved and Accessible
Work Entity
access all versions, variants, and formats of this works (eg, pre-prints)
access all versions, variants, and formats of this works (eg, pre-prints)
Lookup Links