[1] Duke Univ, Med Ctr, Dept Med & Microbiol, Durham, NC 27710 USA
[2] Fred Hutchinson Canc Res Ctr, Seattle, WA 98104 USA
[3] NCI, Bethesda, MD 20892 USA
[4] Univ Kentucky, Lexington, KY USA
[5] Virginia Commonwealth Univ, Med Coll Virginia, Richmond, VA 23298 USA
[6] Pfizer, New York, NY USA
[7] Hop Necker Enfants Malad, Paris, France
[8] Univ Hosp Reina Sofia, Sofia, Bulgaria
[9] Univ Frankfurt, D-6000 Frankfurt, Germany
[10] Pfizer Ltd, Sandwich CT13 9NJ, Kent, England
[11] Bristol Publ Hlth Lab, Bristol, Avon, England