differentiation ADIPONECTIN NORMAL HUMAN SKIN 3D SKIN BILAYERED EQUIVALENT 3D SKIN THREELAYERED EQUIVALENT ATGL NORMAL HUMAN SKIN 3D SKIN BILAYERED EQUIVALENT 3D SKIN THREELAYERED EQUIVALENT FABP4 NORMAL HUMAN SKIN 3D SKIN BILAYERED EQUIVALENT 3D SKIN THREELAYERED EQUIVALENT PERILLIPIN-1 NORMAL HUMAN SKIN 3D SKIN BILAYERED EQUIVALENT 3D SKIN THREELAYERED EQUIVALENT