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;

Design and validation of a questionnaire on habits, health and exercise in the use of baby carriers Yaiza Taboada-Iglesias; María del Carmen Iglesias-Pérez; Águeda Gutiérrez-Sánchez;

Role of fractional exhaled nitric oxide in patients with sickle cell disease Agustín Muñoz-Cutillas; Sara Bellón-Alonso; Eduardo Bardón-Cancho; Santiago Rodríguez-Tubío-Dapena; Lucía Díez-Llamazares; Rosa Rodríguez-Fernández; Juan Luis Rodríguez-Cimadevilla;