Evolutionary analysis of patient¿s morbidity and mortality in emergency surgical care during the pandemic: Retrospective comparison between first and second waves of COVID-19 Carlos Bustamante Recuenco; Esther María Cano Pecharromán; Gloria María Mendoza Esparrell; Mahur Esmailli Ramos; Javier Broekhuizen Benítez; Leticia Martín Paniagua; Teresa Calderón Duque; Tomás Balsa Marín;

Evaluation of textbook outcome in liver transplantation Esther Brea Gómez; Pablo Dabán López; Ana Belén Vico Arias; Antonio Palomeque Jiménez; Natalia Zambudio Carroll; María Trinidad Villegas Herrera; Jesús María Villar del Moral; Mario Serradilla Martín;

Retrospective study on the Delta Shock Index associated with age and the Glasgow Coma Score (dSIAG) as a prognostic scale for mortality in polytrauma patients Ana Victoria Juárez San Juan; Paula Juárez San Juan; Manuel Artiles Armas; Laura Cano Contreras; Paula Beltrán Calero; Carlos Jorge Ripper; Pedro Rodriguez Suárez; Jorge L. Freixinet Gilart;