oooh that is tough. there is a way to answer that question and go around it without revealing a lot of info on your health issues. at the workshops, i forgot how the trainer put it but the way he put it was very good. if you tell employers about all of your health issues, it raises a red flag for them because they see as a unhealthy person who can't keep a job nor do they want to spend all that money on you to keep you healthy.

be careful mentioning about health issues and gaps in your employment when answering that question in the interview.