Cylex Inc., a Columbia, Md.-based provider of immune system testing solutions, has raised $20.5 million in third-round funding. Channel Medical Partners and Canaan Partners co-led the deal, and were joined by Siemens Venture Capital, First Analysis Corp., Calvert Funds, Chesapeake Ventures, NJTC Venture Fund and Roche Venture Fund. Asante Partners advised Cylex on the financing. < ?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />