CHAIR OF THE BOARD INDEPENDENT Age: 72 Director Since: 2007 Committees: Nominating and Governance Committee and Science and Technology Committee (Chair) Dr. Buechler has served as the Chair of the Board since December 2022, and from August 2015 to May 2022. He previously served as the Lead Independent Director from May 2022 to December 2022. Dr. Buechler co-founded Biosite Inc. and held various roles there from 1988 until its acquisition by Alere Inc. in 2007, including serving as a director, President and Chief Scientific Officer, Senior Vice President, Research and Development, and Vice President, Research and Director of Chemistry. Prior to co-founding Biosite, Dr. Buechler was a senior research scientist for the diagnostics research and development group at Hybritech Inc. Dr. Buechler currently serves as a director of TriVirum, Inc. He previously served as chair of the board of directors of Sequenom Inc., a life sciences company, until its acquisition in September 2016, on the board of directors of Astute Medical Inc., a company that develops biomarkers for acute medical conditions, until its acquisition in April 2018, and on the board of directors of Edico Genome Inc., a DNA sequencing technology company, until its acquisition in May 2018. Dr. Buechler received his Ph.D. in Biochemistry and his bachelor s degree in Chemistry from Indiana University. Dr. Buechler brings extensive experience in the field of diagnostics as a scientist and through his founding of Biosite Inc. He also has extensive executive leadership and governance experience through his service on the boards of directors of other companies. Other Current Public Company Directorships: None Prior Public Company Directorships Within the Past 5 Years: None