Is reduced heart rate variability associated with functional somatic disorders? A cross-sectional population-based study; DanFunD oleh Allan Linneberg, Anne Ahrendt Bjerregaard, Marie Weinreich Petersen, Per Fink, Torben Jørgensen, Thomas Meinertz Dantoft, Michael Eriksen Benros, Lene Falgaard Eplov, Signe Ulfbeck Schovsbo, Lise Gormsen, Matilde Winter-Jensen, Louise Schouborg Brinth