RT Journal Article SR Electronic T1 Asthma attacks in children are always preceded by poor asthma control: myth or maxim? JF Breathe JO Breathe FD European Respiratory Society SP 200169 DO 10.1183/20734735.0169-2020 VO 16 IS 3 A1 Heather H. De Keyser A1 Stanley Szefler YR 2020 UL http://breathe.ersjournals.com/content/16/3/200169.abstract AB