More information:
Lauren M. Zell-Baran et al, Mining Tenure and Job Duties Differ Among Contemporary and Historic Underground Coal Miners With Progressive Massive Fibrosis, Journal of Occupational and Environmental Medicine (2023). DOI: 10.1097/JOM.0000000000002746
https://healthmedicinet.com/i/new-findings-suggest-increased-monitoring-needed-to-prevent-lung-disease-in-underground-coal-miners/