TY - JOUR AU - Martinez, F J; Rabe, K F; Calverley, P MA TI - Determinants of response to roflumilast in severe COPD: pooled analysis of two randomized trials JO - Am J Respir Crit Care Med PY - 2018 DO - 10.1164/rccm.201712-2493OC L3 - PubMed-ID: 29763572 N1 - [Epub ahead of print] ER -