Has anyone had any success with getting rid of Psoriasis?

I just finished my dermatology placement a few weeks ago, and saw quite a few people who's condition had improved somewhat after giving up smoking, and one chap had had an increase in plaques after moving in to an all smoking house. I haven't done any sort of research, just anecdotal evidence which seems to reflect the advice given by the consultants in the Psoriasis clinics.

All the best, Will

Thanks. Interesting stuff and noteworthy - guess I smoke about 10 a day and have been meaning/wanting to stop for a while. Ironic though that stopping smoking will potentially be quite stressful and stress is also a trigger for an outburst...