Pericardial fat is associated with atrial fibrillation severity and ablation outcome - Wong, C X; Abed, H S; Molaee, P; Nelson, A J; Brooks, A G; Sharma, G; Leong, D P; Lau, D H; Middeldorp, M E; Roberts-Thomson, K C; Wittert, G A; Abhayaratna, W P; Worthley, S G; Sanders, P (J Am Coll Cardiol, 2011)