Evaluation of Efficacy and Safety of Rituximab in Patients With Progressive Interstitial Lung Disease (ILD) With Inflammatory Component: a Multicentre Double-blind Placebo-controlled Randomized Trial

One course of IV rituximab consisting of a first infusion of 1000 mg (500 mL solution) rituximab (day 1), and a second infusion of 1000 mg (500 mL solution) rituximab two weeks later (day 15)

One course of IV placebo of rituximab consisting of a first infusion of 500 mL of saline (0.9% sodium chloride) infusion (day 1), and a second infusion of 500 mL of saline infusion two weeks later (day 15)