Frequency and Determinants of Spontaneous Conversion to Sinus Rhythm in Patients Presenting to the Emergency Department with Recent-onset Atrial Fibrillation: A Systematic Review - Nikki AHA Pluymaekers; Astrid NL Hermans; Dominik K Linz; Elton AMP Dudink; Justin GLM Luermans; Bob Weijs; Kevin Vernooy; Harry JGM Crijns (Arrhythmia & Electrophysiology Review)