Follow-up study of portuguese patients given thorium dioxide in the perinasal sinuses.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010256:Paranasal Sinuses / Q000000981:diagnostic imaging*; D011174:Portugal; D011859:Radiography; D012189:Retrospective Studies; D012959:Socioeconomic Factors; D013911:Thorium Dioxide
D013911:Thorium Dioxide