2.1 Search strategy
Two investigators (RY and NP) independently searched for published RCTs indexed in PubMed and EMBASE from inception to December 2020 using the search terms including: “atrial fibrillation”, “ablation”, and “initial” as described in supplementary file 1. Only articles in English were included. An additional manual search for potential additional pertinent studies was performed using the references from retrieved articles. Any conflict or discrepancy was resolved by a third author (LN)