Deferred versus Expedited Aortic Valve Replacement in Patients with Symptomatic Severe Aortic Stenosis During the SARS-CoV-2 Pandemic (AS DEFER): A Research Letter - Jonas Lanz; Christoph Ryffel; Noé Corpataux; Nicole Reusser; Taishi Okuno; Bettina Langhammer; David Reineke; Fabien Praz; Stefan Stortecky; Stephan Windecker; Thomas Pilgrim (Ubiquity Press, 2021)