PT - JOURNAL ARTICLE AU - Lukas Kleinjohann AU - Christoph Lange TI - Respirators evaluated by fit testing AID - 10.1183/23120541.00581-2020 DP - 2020 Oct 01 TA - ERJ Open Research PG - 00581-2020 VI - 6 IP - 4 4099 - http://openres.ersjournals.com/content/6/4/00581-2020.short 4100 - http://openres.ersjournals.com/content/6/4/00581-2020.full SO - erjor2020 Oct 01; 6