title: Atrial fibrillation: an unusual cause.
authors: Department of Cardiology, Thoraxcenter, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands; currently at Leiden University Medical Center, Leiden, the Netherlands.
authors: H J
authors: HJ
authors: Siebelink
authors: T P
authors: TP
authors: Willems
authors: M J W
authors: MJ
authors: Götte