Increasing trend in patients with life-limiting and complex chronic conditions Javier Ochoa-Brezmes; Pablo del Villar Guerra; Jesús Andrés de Llano; Jesús Manuel Marugán de Miguelsanz;

Prevalence and temporal evolution of asthma symptoms in Spain. Global Asthma Network (GAN) study Alberto Bercedo Sanz; Antonela Martínez-Torres; Carlos González Díaz; Ángel López-Silvarrey Varela; Francisco Javier Pellegrini Belinchón; Inés Aguinaga-Ontoso; Luis García-Marcos;

Clinical characteristics and mortality risk factors in patients aged less than 18 years with COVID-19 in Mexico and Mexico City Rosa María Wong-Chew; Daniel Ernesto Noyola; Antonio Rafael Villa;