TGFB1 and idiopathic pulmonary fibrosis: Increased expression of TGFβ has been reported in a variety of fibrotic lung diseases [6,7,3], including idiopathic pulmonary fibrosis (IPF), a relentlessly progressive fibrotic lung disease with a median survival from diagnosis of only two years [8], and pulmonary fibrosis associated with systemic sclerosis, one of the leading causes of death in scleroderma patients [9].