Preprint: policy unclear.
Postprint: archiving forbidden.
Published version: archiving allowed.
- On any website or open access repository
- Creative Commons Attribution License
- Authors retain copyright
- Published source must be acknowledged
- Articles are placed in PubMed Central immediately on behalf of authors.
- Publisher's version/PDF must be used
- All titles are open access journals
- Publisher last reviewed on 13/04/2015