Comparing Spirometric Reference Values From Childhood to Old Age Estimated by LMS and Linear Regression Models David Martínez-Briseño; Laura Gochicoa-Rangel; Luis Torre-Bouscoulet; Silvia Cid-Juárez; Rosario Fernández-Plata; Luisa Martínez-Valdeavellano; Sofía Chapela-Lara; Rodrigo del Río-Hidalgo; Rogelio Pérez-Padilla;

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;

The Impact of Altitude on Mortality Rates From COVID-19 in Mexico David Martínez-Briseño; Rogelio Pérez-Padilla; Rosario Fernández-Plata; Manuel Castillejos-López; Anjarath Lorena Higuera-Iglesias;