Steerable Sheath Catheter Navigation for Ablation of Atrial Fibrillation: A Case-Control Study Performed at the University of Leipzig Heart Center in Leipzig, Germany and the Clinic Hirslanden Heart Center in Zurich, Switzerland Christopher Piorkowski, MD Hans Kottkamp, MD Jin-Hong Gerds-Li, MD Arash Arya, MD Philipp Sommer, MD Nicos Dagres, MD Masahiro Esato, MD Sam Riahi, MD Sebastian Weiss, MD Simon Kircher, MD Gerhard Hindricks, MD Published in July 2008 in PACE (Pacing and Clinical Electrophysiology), Volume 31, pages 863-873.