[1] USC Norris Comprehens Canc Ctr, Los Angeles, CA USA
[2] Univ New Mexico, Ctr Canc, Albuquerque, NM 87131 USA
[3] Gentech Inc, San Francisco, CA USA
[4] Southern Calif Permanente Grp, Bellflower, CA USA
[5] Illinois Canc Care, Peoria, IL USA
[6] Thomas Jefferson Univ, Sidney Kimmel Canc Ctr, Philadelphia, PA 19107 USA
[7] F Hoffmann La Roche Ltd, Basel, Switzerland
[8] Genentech Inc, San Francisco, CA 94080 USA