title: Surgical mask placement over N95 filtering facepiece respirators: physiological effects on healthcare workers.
authors.affiliation: National Personal Protective Technology Laboratory/National Institute for Occupational Safety and Health, Laboratory/NIOSH, 626 Cochrans Mill Road, Pittsburgh, PA 15236, USA. dtn0@cdc.gov
authors.forename: Raymond J
authors.initials: RJ
authors.lastname: Roberge
authors.forename: Aitor
authors.initials: A
authors.lastname: Coca
authors.forename: W Jon
authors.initials: WJ
authors.lastname: Williams
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Palmiero
authors.forename: Jeffrey B
authors.initials: JB
authors.lastname: Powell