Boehringer Ingelheim announced phase II data for BI 1015550, a novel investigational phosphodiesterase 4B (PDE4B) inhibitor, that was published in The New England Journal of Medicine (NEJM). The promising 12-week data that showed a reduction in the rate of lung function decline in patients with idiopathic pulmonary fibrosis (IPF) will also be presented at the American Thoracic Society (ATS) International Conference Breaking News session on May 16 in San Francisco.