PTX3 and pulmonary fibrosis: In contrast to our results and proinflammatory and profibrotic claims from the depletion of PTX3 in vivo during bleomycin‐induced pulmonary fibrosis, a distinct experimental approach using systemic Ptx3‐knockout mice before bleomycin exposure suggested that PTX3 played an antifibrotic role in pulmonary fibrosis.52, 53