Is there any Link Between Vitamin D and Recurrence of Atrial Fibrillation after Cardioversion? oleh Belma Yaman, Levent Cerit, Hatice Kemal Günsel, Zeynep Cerit, Songül Usalp, Ümit Yüksek, Uğur Coşkun, Hamza Duygu, Onur Akpınar