bulk download of the citation network?

[bgriffen]

Great package, ty. I was wondering if rather than making API requests for a list of pmids, is there dump of the citation network somewhere for pubmed? I would just need the list of edges in two columns basically (source, destination). I figured this would max out API requests fairly quickly using the examples provided. I know this is a big and maybe impossible ask, but just thought how I'd obtain as much of the network as possible to assist in a recommendation engine I'm working on. Thank you.