Metabolomics identifies biomarkers of exacerbations in smokers with and without COPD - Gotera, Carolina; Pereira Vega, Antonio; Garcia Barrera, Tamara; Marin Trigo, Jose Maria; Casanova Macario, Ciro; Garcia-Cosio, Borja; Mir Viladrich, Isabel; Solanes Garcia, Ingrid; Gomez Ariza, Jose Luis; Lopez Campos, Jose Luis; Seijo Maceiras, Luis; Feu Collado, Nuria; et al. (EUROPEAN RESPIRATORY JOURNAL, 2020)