Critical pregnancy at altitude: A look at Latin America Adrián Avila-Hilari; Amilcar Tinoco-Solórzano; Jorge Vélez-Páez; Manuel Luis Avellanas-Chavala;

Gasometry and altitude: investigation of normal ranges in Quito, Ecuador (2,850¿m above sea level) Jorge Luis Vélez-Páez; Christian Castro-Bustamante; Manuel Luis Avellanas-Chavala;

Correlation and concordance of SaO2/FiO2 and paO2/FiO2 ratios in patients with COVID-19 pneumonia who received non-invasive ventilation in two intensive care units¿ Alberto Belenguer-Muncharaz; Francisco Bernal-Julián; Héctor Hernández-Garcés; Irina Hermosilla-Semikina; Lluís Tormo-Rodriguez; Clara Viana-Marco;