Pharmaceutical The promising 12-week Phase II data for BI 1015550, a novel investigational phosphodiesterase 4B (PDE4B) inhibitor, showed a reduction in the rate of lung function decline in patients with idiopathic pulmonary fibrosis (IPF) will be presented at the American Thoracic Society (ATS) International Conference Breaking News session today (May 16) in San Francisco, 16 May 2022