This page links out to a list of tables giving some statistics around Wikipedia and Medicine in different languages.
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Content
References
As of February 5, 2019, Wikipedia's medical content is supported by 757,855 references in English and 1,596,528 in other languages, for a total of 2,354,383 across all languages. In English 168,985 have a PMID while 261,850 do in other languages. This means at least 430,835 references are journal articles.