Dario Taraborelli, 03/02/2015 03:06:
The dataset currently includes the first known occurrence of a PMID or PMCID citation in an English Wikipedia article and the associated revision metadata, based on the most recent complete content dump of English Wikipedia.
Do you accepted patches for inclusion of other wikis? The easiest way to include all Wikimedia projects is probably to use the externallinks table, we can see how big a difference there is.
Nemo