Gada H, Kirtane AJ, Wang K, Lei Y, Magnuson E, Reynolds MR, Williams MR, Kodali S, Vahl TP, Arnold SV, Leon MB, Thourani V, Szeto WY, Cohen DJ. Temporal Trends in Quality of Life Outcomes After Transapical Transcatheter Aortic Valve Replacement: A Placement of AoRTic TraNscathetER Valve (PARTNER) Trial Substudy. Circ Cardiovasc Qual Outcomes. 2015 Jul; 8(4):338-46.