title: Rheumatoid arthritis and lung cancer: you probably heard it before.
authors.forename: Henrik
authors.initials: H
authors.lastname: Kallberg
mesh_terms: D001172:Arthritis, Rheumatoid / Q000209:etiology* / Q000235:genetics; D004781:Environmental Exposure / Q000009:adverse effects; D020022:Genetic Predisposition to Disease; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology* / Q000235:genetics; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects*