how to end the effect at the middle of a phrase

Hi, I have a very simple question but could not find the answer either
from the manual or the FAQ.

The problem is, 
   /** blah (blah @a x and @a y) blah */
will not only italicize x and y, but also the closing parenthesis. I
could not find a simple way to tell Doxygen to "end the effect of @a"
just after y. Though 
   /** blah (blah @a x and <em>y</em>) blah */
could work but it is not consistent (since most of the time I would use
@a).

Any thoughts?

Thank you
--Ling




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