PT - JOURNAL ARTICLE ED - , TI - “Drivers of year-to-year variation in exacerbation frequency of COPD: analysis of the AERIS cohort” Tom M.A. Wilkinson, Emmanuel Aris, Simon C. Bourne, Stuart C. Clarke, Mathieu Peeters, Thierry G. Pascal, Laura Taddei, Andrew C. Tuck, Viktoriya L. Kim, Kristoffer K. Ostridge, Karl J. Staples, Nicholas P. Williams, Anthony P. Williams, Stephen A. Wootton and Jeanne-Marie Devaster, on behalf of the AERIS Study Group. <em>ERJ Open Res</em> 2019; 5: 00248-2018. AID - 10.1183/23120541.50248-2018 DP - 2019 Jul 01 TA - ERJ Open Research PG - 00248-2018-AUT VI - 5 IP - 3 4099 - http://openres.ersjournals.com/content/5/3/00248-2018-AUT.short 4100 - http://openres.ersjournals.com/content/5/3/00248-2018-AUT.full SO - erjor2019 Jul 01; 5