TNFRSF9 and idiopathic pulmonary fibrosis: While 16% of patients (n = 3, consisting of ILA = 2 (n = 1) and ILA = 3 (n = 2)) in the progression group had evidence of UIP at baseline (versus 84% non-UIP, n = 16), none of the patients in the no-progression group had UIP at baseline (Table 2).