Impact of Complete Versus Incomplete Circumferential Lines Around the Pulmonary Veins During Catheter Ablation of Paroxysmal Atrial Fibrillation: Results From the Gap-Atrial Fibrillation-German Atrial Fibrillation Competence Network 1 Trial - Kuck, KH; Hoffmann, BA; Ernst, SIS (Circulation: Arrhythmia and Electrophysiology, 2016)