Cure Poison 2 (Source)

The cure mod is wound treatment and the formula seems to be as follows: [cure effectiveness]*(1+([wound heal mod, including BE clothes and food]/100))= the amount of poison tick a doctor can cure.

Take this example:

A master CM tosses an AOE mind poison with 400 effectiveness on a master doctor which will tick for 800 points, he then tosses a single mind poison with 550 effectivness which will tick for 1100, together they will tick for 1900. The master doctor, who is wearing +25 wound treatment clothes and taking +25 wound treatment bivoli uses a 550 power cure poison C will heal 1375 points off of the poison tick leaving him with a 525 poison tick for his next cure.

The heal mod formula in this example was 550*(1+(150/100)) = 550*2.5 = 1375

something else to add: even though it uses wound treatment as the modifier, for some reason it uses injury treatment speed for the speed mod, go figure.