http://www.aahanet.org/PublicDocumen...Guidelines.pdf
So obviously the DOI studies say 7 years to a lifetime for DHP. But I missed this before. Even AAHA was saying they helieve 5 years is protective. The charts that are sideways at the abive page is probably the start of the five year thing.
still won't be giving to Ellue, but it is nice for those that feel like they have to follow a schedule.