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2. Graphite pneumoconiosis;Jaffe;Am J Pathol,1958
3. Chronic graphite granulomatous abscess simulating a brain tumor;Mikhael;J Comput Assist Tomogr,1977
4. Graphite foreign body of the conjunctiva simulating melanoma;Guy;Cornea,1984
5. Delayed reaction to ‘lead’ pencil simulating melanoma;Taylor;Cutis,1988