[1] Massachusetts Gen Hosp, Boston, MA 02114 USA
[2] Harvard Univ, Sch Med, Boston, MA USA
[3] Cornell Univ, Weill Med Coll, New York, NY USA
[4] Harvard Univ, Sch Publ Hlth, Boston, MA 02115 USA
[5] Johns Hopkins Univ, Baltimore, MD USA
[6] Univ Penn, Philadelphia, PA 19104 USA
[7] Boston Med Ctr, Boston, MA USA
[8] Monogram Biosci, San Francisco, CA USA
[9] Schering Plough Corp, Kenilworth, NJ USA
[10] Brigham & Womens Hosp, Boston, MA 02115 USA