In reply to Dominicandave:
Its far enough back to not worry on your CV, i'd open out at interview (or be honest with a good recruiter).
Its part of your story and experience and generally health problems can lead to better focus, drive and people skills. (I have a similar 2/3 year gap from cancer, glandular fever and some other sundry illnesses....
Not caused me a problem so far, I doubt it would be an invite to interview stopper, If I was recruiting and saw a gap that I wanted to know more about I'd give you a call to clarify.
All the best with the job search, what are you looking for?
Kev