Sputum purulence-guided antibiotic use in hospitalised patients with exacerbations of COPD
Néstor Soler, Mariano Esperatti, Santiago Ewig, Arturo Huerta, Carlos AgustÃ, Antoni Torres
European Respiratory Journal Dec 2012, 40 (6) 1344-1353; DOI: 10.1183/09031936.00150211