1 EXHIBIT 10.1 STOCK EXCHANGE AGREEMENT THIS STOCK EXCHANGE AGREEMENT (the "Agreement") is made as of the 24th day of February, 1998, by and among Oncor, Inc., a Maryland corporation ("Oncor"), and the persons listed on Schedule A hereto...Stock Exchange Agreement • September 2nd, 1998 • Oncor Inc • In vitro & in vivo diagnostic substances • Maryland
