00480nas a2200193   4500000000100000008004100001100001500042700001300057700001600070700001600086700001300102700001400115700001300129700001700142245009400159250001600253300001000269490000700279       2012                            d1 aJenkins C.1 aCelli B.1 aAnderson J.1 aFerguson G.1 aJones P.1 aVestbo J.1 aYates J.1 aCalverley P.00aSeasonality and determinants of moderate and severe COPD exacerbations in the TORCH study  a7 July 2011  a38-450 v39