format prefix/suffix text

So far as I can tell from googling around and mining the forums, there is no way to add formatting to prefix text of inline citations. This would be a helpful feature to have.

For example {Bojesen, 2013 #7897} get’s formatted as a superscript number in the citation format I’m working in. However if I have say  {but see \Bojesen, 2013 #7897} I get the superscript number preceeded by normal script “but see” when I really need the “but see” to be in superscript.