IL1B and psoriasis: As for two major bullous diseases that can be associated with psoriasis, following genes are suggested to be associated with the disease susceptibility:, IL1B (135), CD16 (136), ATP8 (137), and CYP2D6 (138) in bullous pemphigoid; and CD40L, CD40, BLYS (139), CTLA4 (140), and CD59 (141) in pemphigus foliaceus.