14. Are all articles published by BioMed Central journals open access?

In practice, yes. Before January 2015 some journals also published premium content which was available on a subscription basis for a period of 6 or 12 months. These articles are now open access or should be treated in the spirit of the Creative Commons Attribution license (CC-BY). There is also a small number of articles which are free to read but not open access (gratis but not libre), in most such cases because co-publication arrangements with other publishers may not allow us to apply CC-BY. Please see here for more details.

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