Speed up regeneration (on combat)

Is there anyway to speed up regeneration on combat? Does some of those attributes increase the rate you regenerate endurance, vitality and energy?

So far that I know of… there are healing and mana potions that you can find/make, and there is a spell that puts a character to sleep and he recovers health/mana much faster (but he's out while that happens). There are also some archetypes that regen faster (healer mage I think regens mana faster). Not sure if any stats affect regeneration, as this is something that's very different from the PnP version (I think in PnP you recover 6 mana points per *night*)