CRP and idiopathic pulmonary fibrosis: A two-sample Mendelian randomization study indicated that elevated serum CRP levels have been linked to an increased possibility of the development of Idiopathic Pulmonary Fibrosis (IPF) in European ancestry cases, and another study on IPF with various parameters showed that initial CRP diagnosis levels were associated with poor survival; however, larger studies are required to confirm such data since it was suggested that CRP may serve as an endogenous antifibrotic factor acting in lung fibrosis [686,687].