Pulmonary Disease Among Patients With Systemic Lupus Erythematosus

"Multidisciplinary discussion: Participants will be diagnosed and categorized in regards of pulmonary disease on basis of medical record, PFT, HRCT, and questionnaires.~PFT: Participants will undergo body plethysmography (with diffusion) and six-minute walk test.~Analysis of circulating biomarkers: We will store glasses with serum and glasses with plasma and analyse them for circulating biomarker.~Questionnaires: Participants will complete Danish versions of three questionnaires.~* Saint George's Respiratory Questionnaire Interstitial Pulmonary Fibrosis~* Systemic Lupus Activity Questionnaire~* Lupus Impact Tracker~Review of medical record and clinical investigation with focus on SLE and pulmonary disease.~Thoracic and diaphragmatic ultrasound: The participants will undergo a 14 zone protocol, and be evaluated for b-lines and pleural thickening/irregularities. Diaphragm function will be evaluated according to the M-mode method, area method, and for thickening."