Coal TarSemicarbazonesPyridinesCoalCoal MiningTarsMolecular StructureStructure-Activity RelationshipKeratolytic AgentsPrintingPolycyclic CompoundsPsoriasisCoal AshBenzo(a)pyrenePneumoconiosisDNA AdductsDermatologic AgentsPolycyclic Hydrocarbons, AromaticEczemaUltraviolet TherapySemiconductorsAluminum