Smoking associates with distinct clinical phenotypes in patients with systemic lupus erythematosus: a nationwide Danish cross-sectional study
Objectives SLE displays esp ltd sd-2 large clinical heterogeneity that beyond genetic factors may be determined by environmental exposures.In this Danish nationwide study, we aimed to determine if clinical subsets of SLE were associated with smoking history.Methods At each of six participating centres, incident or prevalent inpatients and outpatien