IL4 and atrial fibrillation: Similarly, IL-12p70 was decreased in pooled cells (p = 0.001), as well as in NP (p = 0.005) and AF cells (p = 0.03), whereas IL-4 was decreased in pooled cells (p < 0.0001) and in NP (p = 0.007) and EP (p = 0.03).