title: [Periodic melanotypsis in massive progressive fibrosis in coal miners].
authors.forename: R
authors.initials: R
authors.lastname: Vidal
mesh_terms: D003032:Coal Mining; D006801:Humans; D010507:Periodicity; D011658:Pulmonary Fibrosis / Q000150:complications* / Q000473:pathology; D013183:Sputum / Q000378:metabolism*
vernacular_title: Melanoptisis periódicas en la fibrosis masiva progresiva de los mineros del carbón.