Blood eosinophil counts and treatment response in COPD: analyses of IMPACT - Pascoe, S; Barnes, N; Brusselle, G; Compton, C; Criner, G; Dransfield, M; Halpin, DMG; Han, MK; Hartley, B; Hilton, E; Lange, P; Lettis, S; Lipson, DA; Lomas, DA; Martinez, FJ; Papi, A; Roche, N; van der Valk, RJP; Wise, R; Singh, D (Pneumologie, 2019)