You'll get the set bonuses for all six pieces of Doctored Wounds
IF ...
All six pieces are in the same power
&
You don't exemplar down 4(or more) levels below the highest level set piece in that power
By example: (3) level 40 pieces & (3) level 46 pieces in the same power will give you all of the set bonuses as long as you don't exemplar down to level 42 or below. You'll still have the bonuses for (3) pieces as long as you don't exemplar to level 36 or lower.
Awesome, thats what I wanted to know before I bid on anymore, thanks 
Ok, I apologize if this has been covered before, and please don't kill me for asking, but does is matter what lvl the IO's are to get a set bonus? Ok, let's say I have 6 slots on healing aura, I'm lvl 43, and I have 3 lvl 40 doctored wounds and 3 lvl 46 doctored wounds in that power, do I get the whole set of 6 bonus, or 2 sets of 3? (I currently have 3 lvl 40 common heal IO's and 3 lvl 40 doctored wounds in there now.)