RT Journal Article SR Electronic T1 Respiratory follow-up pre- and post-engineering controls or cessation of added diacetyl at four microwave popcorn facilities JF ERJ Open Research JO erjor FD European Respiratory Society SP 00042-2019 DO 10.1183/23120541.00042-2019 VO 5 IS 3 A1 Lockey, James E. A1 Hilbert, Timothy J. A1 LeMasters, Grace A1 Dunning, Kari K. A1 McKay, Roy T. A1 Levin, Linda S. A1 Rice, Carol H. YR 2019 UL http://openres.ersjournals.com/content/5/3/00042-2019.abstract AB