Response to Letter to the Editor: A misleading CFS prevalence estimate in DanFunD. Issue 5 (July 2020) - Weinreich Petersen, Marie; Schröder, Andreas; Jørgensen, Torben; Ørnbøl, Eva; Meinertz Dantoft, Thomas; Eliasen, Marie; Wisbech Carstensen, Tina; Falgaard Eplov, Lene; Fink, Per