Determinants of COVID-19 Hospitalization Costs in a Referral Hospital for Respiratory Diseases David Martínez-Briseño; Rosario Fernández-Plata; Rogelio Pérez-Padilla; Anjarath Higuera-Iglesias; Manuel Castillejos-López; Guillermo Casas-Medina; Patricia Sierra-Vargas; Víctor Hugo Ahumada-Topete;

Impact of Chronic Respiratory Diseases on the Outcomes of COVID-19 Zhen-feng He; Nan-shan Zhong; Wei-Jie Guan;

Characteristics and Risk Factors Associated With Mortality in a Multicenter Spanish Cohort of Patients With COVID-19 Pneumonia José Ramón Muñoz-Rodríguez; Francisco Javier Gómez-Romero; José Manuel Pérez-Ortiz; Pilar López-Juárez; Juan Luis Santiago; Leticia Serrano-Oviedo; Francisco Javier Redondo-Calvo;