Where should papers be deposited – PMC or UKPMC?
3.1 If the publisher is undertaking the deposition on behalf of the author, deposition should be made at the PMC site.These papers are then mirrored to the UKPMC site, and other PMCI repositories.See also questions 5 and 6. 3.2In cases where authors are ‘self-archiving’ their peer-reviewed manuscripts, deposition will be made using the UK version of the NIH Manuscript Submission system. Papers that are deposited through this system are ingested into PMC and then mirrored to UKPMC, and other PMCI repositories.