RT Journal Article SR Electronic T1 Objective cough frequency monitoring in real-world practice JF ERJ Open Research JO erjor FD European Respiratory Society SP 00545-2021 DO 10.1183/23120541.00545-2021 VO 7 IS 4 A1 Lee, Ji-Hyang A1 Song, Woo-Jung A1 Millqvist, Eva A1 Morice, Alyn H. YR 2021 UL http://openres.ersjournals.com/content/7/4/00545-2021.abstract AB