1. Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, 10903 New Hampshire Ave., Silver Spring, MD 20993, USA, https://orcid.org/0000-0002-4584-2012 (T.O.W.)
2. The National Personal Protective Technology Laboratory, National Institute for Occupational Safety and Health, 626 Cochrans Mill Rd., Pittsburgh, PA 15236, USA, https://orcid.org/0000-0002-3768-9361 (L.P.)
3. Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, 10903 New Hampshire Ave., Silver Spring, MD 20993, USA (Corresponding author), e-mail: anne.lucas@fda.hhs.gov, https://orcid.org/0000-0002-3938-9127