Kirk K. Calhoun

Director

Kirk K. Calhoun has served as a member of our board of directors since May 2016. Mr. Calhoun joined Ernst & Young LLP, a public accounting firm, in 1965 and served as a partner of the firm from 1975 until his retirement in 2002. Mr. Calhoun is a Certified Public Accountant (non-practicing) with a background in auditing and accounting. He has previously served on the boards and audit committees of seven public companies in the pharmaceutical and medical diagnostic industries. Mr. Calhoun currently serves on the boards of Ryerson Holding Corporation (NYSE: RYI), a metals processor and distributor, and PLx Pharma, Inc. (NASDAQ: PLXP), a specialty pharmaceutical company focused on commercializing aspirin products, plus three private companies, including NeuroSigma, Inc., a developer of products treating major neurological and neuropsychiatric disorders. Mr. Calhoun received a BS in accounting from the University of Southern California.