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John Erb has served as Chairman of the Board since October 2012. Mr. Erb has over 40 years of experience in the medical device industry, executive leadership, and financial management.

Previously, Mr. Erb served as chief executive officer (from 2007 to 2018) of NuAx, Inc. (formerly Cardia Access, Inc.), a medical device company involved in developing new devices for the treatment of heart disease; he was executive chairman of the board (during 2007) and chief executive officer (from 2001 to 2006) of the previous owner of the Aquadex FlexFlow System, which was also known as CHF Solutions, Inc. (now Nuwellis), a medical device company involved in the development, manufacturing and distribution of devices to treat congestive heart failure; as president and chief executive officer of IntraTherapeutics, Inc., a medical device company involved in the development, manufacturing and distribution of peripheral vascular stents, from 1997 to 2001; and in various positions, including as vice president of worldwide operations at Schneider, a division of Pfizer, Inc., from 1991 to 1997.

Mr. Erb serves as Chairman of the Board of Directors for Osprey Medical, a public Australian company listed on the ASX. Mr. Erb previously served on the Board of Directors of Vascular Solutions (acquired by Teleflex in 2017), SenoRx, Inc. (acquired by CR Bard in 2010), and CryoCath Technologies (acquired by Medtronic in 2008).

Mr. Erb has a B.A. degree in Business Administration from California State University, Fullerton.