For example, vitamin D3 was found to attenuate Th2 response in cystic fibrosis patients with allergic bronchopulmonary aspergillosis by substantially reducing DC-expressed costimulatory molecule OX40 ligand (OX40L) and increasing TGFβ expression (33). The gene discussed is TNFSF4; the disease is allergic bronchopulmonary aspergillosis.