00539nas a2200205   4500000000100000000000100001008004100002100001200043700001800055700001700073700001200090700001900102700001400121700001300135700001500148245014000163300000900303490000700312022001400319       2021                            d1 aK. Wing1 aE. Williamson1 aJ. Carpenter1 aL. Wise1 aS. Schneeweiss1 aL. Smeeth1 aJ. Quint1 aI. Douglas00aMedications for chronic obstructive pulmonary disease: a historical non-interventional cohort study with validation against RCT results  a1-700 v25  a1366-5278