Methotrexate in juvenile idiopathic arthritis. Adverse effects and associated factors Estefanía Barral Mena; Luis Miguel García Cárdaba; Anna Canet Tarrés; Eugenia Enríquez Merayo; Alejandro Cruz Utrilla; Jaime de Inocencio Arocena;

IgA deficiency and autoimmune comorbidities in Juvenile Idiopathic Arthritis David Torres-Fernandez; Iñigo Perez-Heras; Beatriz Fernandez-Manso; Pilar Galán del Río; Luis Ignacio Gonzalez-Granado; Jaime de Inocencio;

Physical, social, and emotional impact on patients with congenital heart disease undergoing cardiac catheterization Maricel Licht-Ardila; Alexandra Hurtado-Ortiz; Edgar Fabián Manrique-Hernández; Justo José Santiago Peña;