Martin, G P, Curzen, N, Goodwin, A T, Nolan, J, Balacumaraswami, L, Ludman, P F, Kontopantelis, E, Wu, J, Gale, C P, de Belder, M A & Mamas, M A 2021, ' Indirect Impact of the COVID-19 Pandemic on Activity and Outcomes of Transcatheter and Surgical Treatment of Aortic Stenosis in England ', Circulation. Cardiovascular interventions, vol. 14, no. 5, pp. 532-543 . https://doi.org/10.1161/CIRCINTERVENTIONS.120.010413 Circulation. Cardiovascular Interventions