HRS/EHRA/ECAS expert consensus statement on catheter and surgical ablation of atrial fibrillation : Recommendations for personnel, policy, procedures and followup : A report of the Heart Rhythm Society (HRS) Task Force on Catheter and Surgical Ablation of Atrial Fibrillation developed in partnership with the European Heart Rhythm Association (EHRA) and the European Cardiac Arrhythmia Society (ECAS) ; in collaboration with the American College of Cardiology (ACC), American Heart Association (AHA), and the Society of Thoracic Surgeons (STS)