Adding PMID macro to AMA.csl

[wmhorne]

AMA allows PMIDs to be included in references when desired.

This PR attempts to add a PMID to the end of the reference when a PMID is present.

In Zotero, this works as expected:

[github-actions]

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[github-actions]

😃 Your submission passed all our automated tests.

Below are some sample citations generated based on your proposed changes:

american-medical-association.csl (modified style; unchanged output for sample items)

1,2
3,4

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1.Hancké B, Rhodes M, Thatcher M, eds. Beyond Varieties of Capitalism: Conflict, Contradiction, and Complementarities in the European Economy. Oxford University Press; 2007.
2.CSL search by example. Citation Style Editor. 2012. Accessed December 15, 2012. http://editor.citationstyles.org/searchByExample/
3.Mares I. Firms and the welfare state: When, why, and how does social policy matter to employers? In: Hall PA, Soskice D, eds. Varieties of Capitalism. The Institutional Foundations of Comparative Advantage. Oxford University Press; 2001:184-213.
4.Fenner M, Crosas M, Grethe JS, et al. A data citation roadmap for scholarly data repositories. Sci Data. 2019;6(1):28. doi:10.1038/s41597-019-0031-8

[bwiernik]

Can you quote the manual where it talks about including PMID? I don't currently have access to a copy of the AMA manual

[wmhorne]

@bwiernik While not exactly a rule, it's mentioned under the Electronic References section:

Additionally, it's visible in this example citation when searching the AMA site:

[adam3smith]

Thanjs for this! We certainly shouldn't take this as part of the main AMA style -- that's used for lots of journals and I've never seen PMIDs in those style guides.
I also think it's pretty clear from the AMA guide that you screenshot that PMIDs are not to be included -- they say they are usually used behind the scenes. If there's a clear general use case, I think we can consider a variant, but I'd want to see the need (as opposed to preferences) clearly established. FWIW, I don't think anyone has ever asked for or about this

[wmhorne]

@adam3smith makes sense—I will make this change in a custom csl.

For what it's worth, does the approach I took seem like a good way to do it?

[adam3smith]

Yes, that will work perfectly. FWIW, you can do this in a single line with exactly same output:

<text variable="PMID" prefix=". PMID:"/>