Biotechnology Northwest Biotherapeutics (OTCBB: NWBO.ob) yesterday reminded markets, in response to recent investor concerns about Dendreon's Provenge (sipuleucel-T), immune therapy, that NWBT's DCVax immune therapies for a broad range of cancers (including prostate, brain, ovarian and others) hold the promise, based on available data to date, of being cost effective and priced below other immune therapies while still providing substantial profit margins for the company and longer survival for patients. 11 August 2011