00491nas a2200193   4500000000100000008004100001100001500042700001500057700001600072700001500088700001400103700001300117700001900130700001100149700001400160700001300174245009600187022001400283       2020                            d1 aM. Kerkhof1 aJ. Voorham1 aP. Dorinsky1 aC. Cabrera1 aP. Darken1 aJ. Kocks1 aM. Sadatsafavi1 aD. Sin1 aV. Carter1 aD. Price00aAssociation between COPD exacerbations and lung function decline during maintenance therapy  a0040-6376