TNF and hydrops fetalis: The absence of dendritic cells in MucilAirTM-HF tissues might have led to the lack of marked inflammatory response to LPS and TNF-α, while the lack of macrophages in EpiAlveolarTM tissues might have impacted the response to Crystalline silica, Amorphous silica, Amiodarone, and LPS given the lack of response in the cytokine/chemokine panel.