00484nas a2200193   4500000000100000000000100001008004100002100001700043700001400060700001300074700001600087700001900103700001300122700001600135245010500151300001200256490000800268022001400276       2012                            d1 aH. Mullerova1 aC. Chigbo1 aG. Hagan1 aM. Woodhead1 aM. Miravitlles1 aK. Davis1 aJ. Wedzicha00aThe natural history of community-acquired pneumonia in COPD patients: a population database analysis  a1124-330 v106  a0954-6111