Dear all,
Thought I'd post that, by piecing together everything Matia has told me, snippets from her dissertation and this website, I have finally worked out how I got this, why it went into remission and why it has returned. This is huge for me, given that, as you may have noticed, I am the type of person who 'needs to know how and why' :) It all makes perfect sense now and this treatment, without doubt, IS on the right track. Hopeully, I'll settle down now, accept the inevitable (that this is really happening) and get on with it!