Author Location / Affiliation searches in PubMed
One way to limit results to studies conducted by US researchers is to add an Affiliation set to your search.
You can limit results to include only articles where one author is affiliated with a US institution by adding the following words to your search.
You can use the same process to limit a search to UNC-CH affiliated authors. A search for UNC includes a fair amount of "noise". Fortunately, "chapel hill" is a fairly unique name. I usually just add
AND "chapel hill"[ad]
Note that you will miss any articles that do not have complete affiliation data, for example, any that just have the author's email. Please also note that older articles often have less complete affiliation data.
The information that is included in the Affiliation field [ad] changed Jan 1, 2014.
"Affiliation may be included for authors, corporate authors and investigators, e.g., cleveland [ad] AND clinic [ad], if submitted by the publisher. Multiple affiliations were added to citations starting from 2014, previously only the first author’s affiliation was included."
If you are interested in research limited to populations in the United States you can use our developing countries search hedge to eliminate many countries. Run your topic search (set #1) and then run the search hedge (set #2) and then run a search that is:
#1 NOT #2
To remove even more countries from the results add the following to the search hedge:
OR Europe[MeSH] OR Australia[MeSH] OR Asia[MeSH]
Let me know if you have questions.