title: Potential bias in research of heart rate variability in fibromyalgia and chronic fatigue syndrome.
authors.affiliation: Dimence Institute of Mental Health, Nico Bolkesteinlaan 1, 7416 SB Deventer, the Netherlands. Electronic address: L.Tak@dimence.nl.
authors.forename: Lineke M
authors.initials: LM
authors.lastname: Tak
authors.affiliation: Interdisciplinary Center for Psychopathology and Emotion regulation (ICPE), University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
authors.forename: Judith G M
authors.initials: JG
authors.lastname: Rosmalen
mesh_terms: D015673:Fatigue Syndrome, Chronic / Q000503:physiopathology*; D005356:Fibromyalgia / Q000503:physiopathology*; D006339:Heart Rate / Q000502:physiology*; D006801:Humans