1. Division of Applied Mechanics, 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: shiril.sivan@fda.hhs.gov, https://orcid.org/0000-0003-3120-5976
2. Division of Applied Mechanics, 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/0000-0003-4344-8772 (J.W.)