About This Journal FREE

Editor: Frederick P. Rivara, MD, MPH Archives of Pediatrics & Adolescent Medicine Department of Pediatrics Child Health Institute University of Washington 6200 NE 74th St, Suite 210 Seattle, WA 98115-8160 Phone: (206) 685-3573 Fax: (206) 685-3572 e-mail: archpediatrics@jama-archives.org

Associate Editors: Abraham Bergman, MD, Seattle, Wash Dimitri A. Christakis, MD, MPH, Seattle, Wash Alain Joffe, MD, MPH, Baltimore, Md

Editorial Manager: Suzanne Shuey, Seattle, Wash

Statistical Consultant: Peter Cummings, MD, MPH, Bishop, Calif

David A. Brent, MD, Pittsburgh, Pa Jeffrey P. Brosco, MD, PhD, Miami, Fla Leona Cuttler, MD, Cleveland, Ohio Phyllis Armelle Dennery, MD, Philadelphia, Pa Carolyn DiGuiseppi, MD, MPH, Denver, Colo M. Denise Dowd, MD, MPH, Kansas City, Mo Gary L. Freed, MD, MPH, Ann Arbor, Mich Frances P. Glascoe, EdS, PhD, Nashville, Tenn Jorge E. Gómez, MD, San Antonio, Tex Harold P. Lehmann, MD, PhD, Baltimore, Md David J. Schonfeld, MD, Cincinnati, Ohio Donald F. Schwarz, MD, MPH, MBA, Philadelphia, Pa Phillip M. Sherman, MD, FRCPC, Toronto, Ontario Tina Q. Tan, MD, Chicago, Ill Robert C. Whitaker, MD, MPH, Princeton, NJ Albert C. Yan, MD, Philadelphia, Pa

Book Reviews and Other Media: Abraham Bergman, MD, Seattle, Wash Evidence-Based Journal Club: Dimitri A. Christakis, MD, MPH, Seattle, Wash Harold P. Lehmann, MD, PhD, Baltimore, Md Picture of the Month: Albert C. Yan, MD, Philadelphia, Pa Assistant Section Editor: Samir S. Shah, MD, Philadelphia, Pa

Offices: 515 N State St, Chicago, IL 60610Catherine D. DeAngelis, MD, MPH, Editor in Chief, Scientific Publications & Multimedia Applications Cheryl Iverson, Managing Editor

Department Director: Paula Glitman Manuscript Editing Manager: Brenda Gregoline Manuscript Editors: Shannon L. Foley, Tracy Frey, Kristine Simmons, Mahsa M. Tousi Freelance Manuscript Editing Manager: Diane L. Cannon Freelance Manuscript Editing Coordinators: Vickey Golden, Connie Manno, Cheryl L. Tobey Freelance Copy Editors and Copyreaders: Catherine A. Alden, Lisa M. Cluver, Mary Coerver-Connolly, Allison Esposito, Laura King, Mary A. Kingzette, Nicole C. Netter, Caroline Woods Editorial Systems Managers: Paul Frank, Monica Mungle Systems Programmer/Internet Specialist: J.D. Neff Editorial Assistant: Wanda Hill

Executive Assistant to the Editor: Marla A. Hall

Director: Margaret Winker, MD Electronic Media Department Director: Michelle Kurzynski Associate Web Editors: Erin M. Giannini, Peter Kim Web Administrative Assistant: Reuben Rios

Senior VP & Publisher: Robert A. Musacchio, PhD Assistant Publisher: Geoffrey Flick VP Office Staff: Paul Gasiecki, Terri Hanley, Christine Hearne

Publisher: Bonnie Chi-Lum, MD, MPH

Publishing Director: Frank Iorio Director, Circulation Sales & Marketing: William Fox Director, Licensing & Permissions: Norman Frankel, PhD Managers: Kathy Dalton, Vida Damijonaitis Staff: Rhonda Bailey Brown, Millette Jackson-Bates, Sandra Garzon, Anna Goins, Jeremy Nielsen, Saskia Volkers Director, Marketing Support Services: Mark Thornbury Staff: Nancy Bell, Susan Lovenberg, Mirna Monal, Dennis Sammartino, Debra Ann Sardo Director, Reprints: Mark Kuhns

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Manager: Thalia Moss Staff: Shana Brown, Colleen Casey, Kim Jenkins

Division Director: Vanessa Hayden Directors:Karen Adams-Taylor, Carmela Barhany, Sue Sherrill Managers: David Antos, Karen Branham, Suzanne J. Bukovsky, Debbie Camp, Diane Darnell, Karl Elvin, Betty Frigerio, Linda Gardner, Charl Jensen, Mary Ellen Johnston, Mark Matura, Michael McGraw, Phil O'Leary, Susan Price, Alfred Tomaselli, Stacy Tucker Advertising and Production Services: Susan Chiara, Mary Anne Donley, Euwanaha Joiner-Smith, Brian McCartney, Noemi Olmo, Mercy Oni, Ryan Patella, Carole Piszker, Cindy Rendlen, Denise Steinhauser, Ellen Yoshihara Circulation Processing: Bernadette Bauer, Julie Burton, Linda Christian, Rosa Eng, Felicia Kyles, Lawrence Majkszak, Kathryn Osten Composition and New Media: Gail Barrett, Regina Brownlee, Brenda Chandler-Grayer, Amy Evers, Angela Kim, Mary Ann Kuranda, Sandra Lopez, Bruce McGregor, Sean O'Donnell, Patricia E. Panek, Ted Piwowar, La'son Diggs Sledge, George Thomson Graphics: Joe Amft, Fred Furtner, Carolyn Hall, Maria Kowalkowski, Chris Meyer, JoAnne Weiskopf Proofreading: Carol Joy Farrell, Daniel James, Judith A. Literskis, Teresa H. Omiotek, Barbara Wojtowicz, Agnes A. Zarkadas

Michael D. Maves, MD, MBA, Executive Vice President, Chief Executive Officer Bernard L. Hengesbaugh, Chief Operating Officer Robert A. Musacchio, PhD, Senior Vice President, Publishing & Business Services

All articles published, including editorials, letters, and book reviews, represent the opinions of the authors and do not reflect the policy of the American Medical Association, the Editorial Board, or the institution with which the author is affiliated, unless this is clearly specified.

Copyright 2005 by the American Medical Association. All rights reserved. Reproduction without permission is prohibited.