AGER and idiopathic pulmonary fibrosis: For example, Ager encodes a surface protein expressed on the lung epithelium (Wolf et al. 2017), and candidate gene association studies have reported an increased risk (Yamaguchi et al. 2017) or no increased risk (Manichaikul et al. 2017) of the related trait of idiopathic pulmonary fibrosis in patients carrying an AGER minor allele.