PneumoconiosisCoal MiningAnthracosisCoalMiningSilicosisDustDental TechniciansX-Ray FilmCaplan SyndromeAsbestosisTalcOccupational ExposureQuartzKaolinWorkers' CompensationSilicon DioxideRadiography, ThoracicPolyvinyl ChlorideClassificationOccupational DiseasesLungMaximum Allowable ConcentrationSiderosisMass Chest X-RayNational Institute for Occupational Safety and Health (U.S.)WeldingPulmonary FibrosisVital CapacityMetallurgyAsbestosAppalachian RegionAir Pollutants, OccupationalRespiration DisordersAluminum SilicatesBronchitisRheumatoid NoduleLaboratories, DentalPolyvinylsForced Expiratory Volume