Thomas R. Varricchione has been V.P. of Clinical and Regulatory Affairs since
August 2000. Prior to that Mr. Varricchione had been Vice President, Clinical and
Regulatory with Affairs MedAcoustics Inc. developers of non-invasive systems for
detecting coronary artery disease as well as Vice President, Clinical and Regulatory Affairs with Photoelectron Corp. developers of minimally-invasive
therapeutic x-ray systems treating cancerous tumors.