Christopher J. Calhoun is a co-founder of the Company and has served as a Director since 1997. Mr. Calhoun served as Chief Executive Officer from 1997 until April 2014. Mr. Calhoun retired as Chief Executive Officer effective April 2, 2014 and agreed to serve as Managing Director for a transition period through July 1, 2014 to facilitate the orderly transfer of responsibilities. Mr. Calhoun also served as our President from April 2002 to May 2005 and from 1996 to 1998. He is a co-inventor on multiple U.S. and international patents for medical devices and implant instrumentation, and was involved in research and management for the Plastic Surgery Bone Histology and Histometry Laboratory at the University of California, San Diego. Mr. Calhoun is a co-founder and Chairman of the Board of Leonardo MD, and previously served on the Board of Directors of StemSource, Inc. which was acquired by the Company in 2002. Mr. Calhoun serves on the Board of Directors of The Alliance for Regenerative Medicine (ARM) and also serves as a member of their Executive Committee. Mr. Calhoun earned a B.A. from the University of California, San Diego and an M.B.A from the University of Phoenix.

Source: Plus Therapeutics, Inc. on 06/12/2014