
Keywords: اختلالات عملکردی; FSS; Functional Somatic Syndromes; FM; Fibromyalgia; CFS; Chronic Fatigue Syndrome; IBS; Irritable Bowel Syndrome; BDS; Bodily Distress Syndrome; LCA; Latent Class Analysis; DanFunD; Danish Study of Functional Disorders; MS; Musculoskeletal; GI; Gastroint