RT Journal Article SR Electronic T1 “Comparison between traditional and nontraditional add-on devices used with pressurised metered-dose inhalers”. Mina Nicola, Youssef M.A. Soliman, Raghda Hussein, Haitham Saeed and Mohamed Abdelrahim. ERJ Open Res 2020; 6: 00073-2020. JF ERJ Open Research JO erjor FD European Respiratory Society SP 50073-2020 DO 10.1183/23120541.50073-2020 VO 7 IS 3 YR 2021 UL http://openres.ersjournals.com/content/7/3/50073-2020.abstract AB