1. Andrade JG, Deyell MW, Badra M, Champagne J, Dubuc M, Leong-Sit P, Macle L, Novak P, Roux JF, Sapp J, Tang A, Verma A, Wells GA, Khairy P (2017) Randomised clinical trial of cryoballoon versus irrigated radio frequency catheter ablation for atrial fibrillation—the effect of double short versus standard exposure cryoablation duration during pulmonary vein isolation (CIRCA-DOSE): methods and rationale. BMJ Open 7(10):e017970
2. Aryana A, Bowers M, O’Neill P (2015) Ablation of atrial fibrillation: a comprehensive review. JAFIB 8(2):39–50
3. Bothwell L, Greene J, Podolsky S, Jones D (2016) Assessing the gold standard—lessons from the history of RCTs. N Engl J Med 374:2175–2218
4. Bowden J, Tierney JF, Copas AJ, Burdett S (2011) Quantifying, displaying and accounting for heterogeneity in the meta-analysis of RCTs using standard and generalized Q statistics. BMC Med Res Methodol 11:41
5. Calkins H, Reynolds MR, Spector P, Sondhi M, Xu Y, Martin A, Williams CJ, Sledge I (2009) Treatment of atrial fibrillation with antiarrhythmic drugs or radiofrequency ablation: two systematic literature reviews and meta-analyses. Circ Arrhythm Electrophysiol 2(4):349–361