Remove extra quotes, potentially update citation in `DESCRIPTION`

[brookslogan]

• Remove extra quotes, e.g., 'Healthcare', Ryan J. 'Tibshirani'.
• Citation for the API is pretty old; is there a better one to use?

[dsweber2]

So the quotes are there to get the automated CRAN warnings to stop yelling at us; I didn't think they were actually going to render. I suppose we could ask the humans to ignore them.

Yeah, we were commenting at the time that the citation is rather out of date. Would love an alternative