PT - JOURNAL ARTICLE AU - Cen, Lai-Jian AU - Zhang, Xiao-xian AU - Guan, Wei-Jie TI - Phenotyping acute exacerbation of COPD: what more can we do for hospitalised patients? AID - 10.1183/23120541.00362-2021 DP - 2021 Jul 01 TA - ERJ Open Research PG - 00362-2021 VI - 7 IP - 3 4099 - http://openres.ersjournals.com/content/7/3/00362-2021.short 4100 - http://openres.ersjournals.com/content/7/3/00362-2021.full SO - erjor2021 Jul 01; 7