National Immunization Program, Centers for Disease Control and Prevention, Atlanta, Ga: Frank DeStefano, MD, MPH, Robert T. Chen, MD, MA, John Glasser, PhD, MPH, Philip H. Rhodes, PhD, Piotr Kramarz, MD, Thomas Verstraeten, MD, David Walker, MPH, Catherine A. Okoro, MS. Group Health Cooperative, Seattle, Wash: Robert S. Thompson, MD, Lisa A. Jackson, MD, MPH, Robert L. Davis, MD, MPH, William E. Barlow, PhD, Kari Bohlke, ScD, Patti Benson, MPH, Barbara Carste, MPH, Jo Ann Habakangas, BA, Christi Hanson, BA, Paula Lee Poy, BA, Darren Malais, BS, Viviana Rebolledo, BS, Wendy Rogers, BA, David Rubanowice, BS, Dennis Sheeran, MS, Onchee Yu, MS, Ann Zavitkovsky, MPH, MPA. Kaiser Permanente Northwest Region, Portland, Ore: John P. Mullooly, PhD, Julie E. Maher, PhD, MS, Sheila Weinman, PhD, Lois Drew, BA, Jill Mesa, Kim Olson, Heather Houston, RN, Colleen Chun, MD, Steven Gancher, MD, John A. Pearson, MD, Jerry Slepak, MD, Alan Bauck, BS, Teresa Kimes, MS, Joseph Murphy, BA, Nadia Redmond, MSPH, Karen Riedlinger, BS, Roberleigh Schuler, MS, Carol Sullivan, Gayle Thomas-Monk. Kaiser Permanente of Northern California, Oakland: Steven B. Black, MD, Henry R. Shinefield, MD, Paula Ray, MPH, Edwin Lewis, MPH, Bruce H. Fireman, MA, Joan Schwalbe, Ajit De Silva, Patti Hallam. Center for Vaccine Research, Harbor-UCLA Medical Center, Torrance, Calif: Joel I. Ward, MD, Connie M. Vadheim, PhD, Hang Lee, PhD, Ken Zangwill, MD, Eileen Eriksen, MPH, Tracy Zhang, MS, Jennifer Lee, MS, Jennie Jing, MA, Nancy Goff, Jeffrey Perlman, MD. Southern California Kaiser Permanente, Los Angeles, Calif: S. Michael Marcy, MD, Marlene Lugg, DrPH. Center for Biologics Evaluation and Research, Food and Drug Administration, Rockville, Md: M. Miles Braun, MD, MPH, Robert P. Wise, MD, MPH, Robert Ball, MD, MPH. Division of Vaccine Injury Compensation, Health Resources and Services Administration, Rockville, Md: Vito Caserta, MD, MPH, Geoffrey Evans, MD.