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 the pandemic on surgical activity in colorectal cancer in Spain. Results of a national survey Fernando de la Portilla de Juan; María Luisa Reyes Díaz; Irene Ramallo Solía;

Human factors in surgical practice: a national study Mireia Verdaguer-Tremolosa; Víctor Rodrigues-Gonçalves; Pilar Martínez-López; Manuel López Cano;