00346nas a2200133   4500000000100000008004100001100001500042700001400057700001700071245009400088300001000182490000600192022001400198       2014                            d1 aY. Punekar1 aA. Shukla1 aH. Mullerova00aCOPD management costs according to the frequency of COPD exacerbations in UK primary care  a65-730 v9  a1176-9106