Applicants: The United States of America, as represented by the Secretary, Department of Health and Human Serv, Arizona Bloard of Regents on behalf of the University of Arizona, Queen Mary and Westfiled College, University of London, Board of Regents of the University of Nebraska, Oslo University Hospital HF, Oregon Health & Science University, University of Rochester, Hospital Clinic, Universitat De Barcelona, British Columbia Cancer Agency Branch, Julius-Mazimilians-University of Wuerzburg