Inhaled bronchodilators use and clinical course of adult inpatients with Covid-19 pneumonia in Spain: A retrospective cohort study - Villamañán E; Sobrino C; Carpio C; Moreno M; Arancón A; Lara C; Pérez E; Jiménez C; Zamarrón E; Jiménez-Nácher I; Herrero A; Álvarez-Sala R (Pulmonary Pharmacology & Therapeutics, 2021)