RHYTHM-AF: design of an international registry on cardioversion of atrial fibrillation and characteristics of participating centers oleh Crijns Harry JGM, Bash Lori D, Chazelle François, Le Heuzey Jean-Yves, Lewalter Thorsten, Lip Gregory YH, Maggioni Aldo P, Martín Alfonso, Ponikowski Piotr, Rosenqvist Mårten, Sanders Prashanthan, Scanavacca Mauricio, Bernhardt Alexandra A, Unniachan Sreevalsa, Phatak Hemant M, Gitt Anselm K