So here I am - this is the blog version of the weekly reading list I've been doing for the past year or so for people studying to Master's level in public health.
There's a fantastic article in the current British Medical Journal:
Long term effects of dietary sodium reduction on cardiovascular disease outcomes: observational follow-up of the trials of hypertension prevention (TOHP) Nancy Cook et al. BMJ 334 (7599), 885 (28 Apr 2007) info:doi/10.1136/bmj.39147.604896.55
Worth a careful study - of course it takes you back to what the diet intervention actually was.