Prospective cross‐sectional study using Poisson renewal theory to study phase singularity formation and destruction rates in atrial fibrillation (RENEWAL‐AF): Study design oleh Jing Quah, Dhani Dharmaprani, Anandaroop Lahiri, Madeline Schopp, Lewis Mitchell, Joseph B. Selvanayagam, Rebecca Perry, Fahd Chahadi, Matthew Tung, Waheed Ahmad, Nikola Stoyanov, Majo X. Joseph, Cameron Singleton, Andrew D. McGavigan, Anand N. Ganesan