Content Provider
Springer Nature (via Crossref)
19
University of Tromsø: Munin Open Research Archive
19
Directory of Open Access Journals: DOAJ Articles
12
Oxford University Press (via Crossref)
9
Oxford University Press
6
PubMed Central (PMC)
5
ScienceDirect (Elsevier - via Crossref)
5
ScienceDirect (Elsevier)
4
BioMed Central
3
HighWire Press (Stanford University)
2
Karger (via Crossref)
2
Opin vísindi (Iceland)
2
The BMJ
2
Wiley Online Library (via Crossref)
2
Australian Catholic University: ACU Research Bank
1
Cambridge University Press
1
Cambridge University Press (via Crossref)
1
Frontiers: Figshare
1
Hirsla - Landspítali University Hospital research archive
1
Imperial College London: Spiral
1
Ovid
1
PUBLISSO Fachrepositorium Lebenswissenschaften (ZB MED)
1
Sykehuset Innlandet HF: SIHF Open Archive
1
The BMJ (via Crossref)
1
University College London: UCL Discovery
1
Utrecht University Repository
1
Wiley Online Library
1