The impact of COVID-19 in patients with severe aortic stenosis: Artificial intelligence research Virginia Pascual-Tejerina; Pedro Beneyto; Tomás Cantón; Luis Manuel Hernando; Luis F. Pajín; José Moreu-Burgos; Luis F. López-Almodóvar; Luis Rodríguez-Padial;

National survey on the treatment of cholelitiasis in Spain during the initial period of the COVID-19 pandemic Benedetto Ielpo; Mikel Prieto; Irene Ortega; José María Balibrea; Inés Rubio-Pérez; Montse Juvany; Miguel Ángel Gómez-Bravo; José Manuel Ramia;

Impact of SARS-COV-2 pandemic on elective and emergency surgery in a university hospital Eloy Maldonado-Marcos; Cèlia Caula-Freixa; Pere Planellas-Giné; José Ignacio Rodríguez-Hermosa; Santiago López-Ben; Olga Delisau-Puig; Antoni Codina Cazador;