Hi Mark,

Just to make sure we're on the same page, these pre-defined timepoints are not actually based on time, right?

So if two people come in for Day Zero, they may not necessarily be on the same day or even the same month, right? So person #1 might have their Day Zero on January 29th, 2015 while person #2's Day Zero could have been a year ago. Is that more accurate to what you're trying to do?

Regards,

Jon