Reply to the Letter to the Editor ¿Pathogenesis of pneumoperitoneum in COVID-19 patients¿ Ignacio Antonio Gemio del Rey; Roberto de la Plaza Llamas; José Manuel Ramia; Aníbal Armando Medina Velasco;

Comparison and combination of three data sources from patient medical records to determine optimal quantification of postoperative morbidity according to the Clavien Dindo Classification and the Comprehensive Complication Index. A prospective study Roberto de la Plaza Llamas; Paula Soto García; Wenzhong Sun; Ignacio Antonio Gemio del Rey; Daniel Alejandro Díaz Candelas; Ludovica Gorini; Farah Al Shwely Abduljabar; Raquel Aránzazu Latorre Fragua;

Evaluation of preoperative clinical and serological determinations in complicated acute appendicitis: A score for predicting complicated appendicitis Cristina García-Amador; Vladimir Arteaga Peralta; Roberto de la Plaza Llamas; Miguel Torralba; Anibal Medina Velasco; José Manuel Ramia;