plosSearch: Searches for a term in PLOS since a given publication date
In FoodStandardsAgency/hs-test-case-dev: Publication analysis tool

Searches for a term in PLOS since a given publication date

1	plosSearch(query, since = Sys.Date() - 7, limit = 100)

`query`	text of the query
`since`	date, default is today minus a week
`limit`	maximum number of articles to return (default = 100)

# search for just the word "microbiome" in all fields
plosSearch("microbiome")
# search for the term "gut microbiome"
plosSearch("gut microbiome")
# search for the words "gut" and "microbiome" within 10 words of each other
plosSearch("'gut microbiome'~10")