Black Lung Disease and Coal Miners (IMAGE) American Thoracic Society Caption Progressive massive fibrosis (PMF), the most debilitating and deadly form of black lung disease, is increasing among US coal miners despite the implementation of dust controls decades ago, according to new research presented at the ATS 2018 International Conference. Credit ATS Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.