About This Journal FREE

The Archives of Pediatrics & Adolescent Medicine is a monthly, peer-reviewed journal for physicians and other health care professionals who contribute to the health of children and adolescents. The Archives provides an open forum for dialogue on a full range of clinical, scientific, advocacy, and humanistic issues relevant to the care of pediatric patients from infancy through young adulthood. The Archives is a vehicle for increased attention to adolescent health, the education of pediatric health care professionals, and disease prevention and health promotion. The Archives publishes original studies, editorials, reviews by experts, practice commentaries, case quizzes, and updates on clinical science and practice management. The Pediatric Forum provides our readers with opportunities to express their views. Archives incorporates AJDC, the oldest journal in US pediatric literature, which originated in 1911.

Editor: Frederick P. Rivara, MD, MPH Archives of Pediatrics & Adolescent Medicine Department of Pediatrics Child Health Institute University of Washington Box 354920 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 Schonfeld, MD, New Haven, Conn 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

Book Reviews and Other Media: Abraham Bergman, MD, Seattle, Wash Clinical Problem Solving: Abraham Bergman, MD, Seattle, Wash Evidence-Based Journal Club: Dimitri A. Christakis, MD, MPH, Seattle, Wash Harold P. Lehmann, MD, PhD, Baltimore, Md

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

Department Director: Paula Glitman Manuscript Editing Manager: Brenda Gregoline Senior Manuscript Editors: Vickey Golden, Cheryl L. Tobey Manuscript Editors: Tracy Frey, Novid Parsi, Keith Ulrich Freelance Manuscript Editing Manager: Diane L. Cannon Freelance Manuscript Editing Coordinator: Connie Manno Freelance Copy Editors and Copyreaders: Catherine A. Alden, Karen L. Boyd, 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 Editor: Erin M. Giannini Web Office Manager: Nadine Siewnarine

VP & Group Publisher: Nawin Gupta, PhD

Assistant Publisher: Geoffrey Flick VP Office Staff: Colleen Casey, 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 Braun, Vida Damijonaitis Staff: Rhonda Bailey, 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 Staff: Wanda Bartolotta, Joseph Rekash

Director: Jeffery J. Bonistalli Sales Representatives: Peter G. Messina, Patricia Quilty

Manager: Thalia Moss Staff: Kimberly Bitowt, Shana Brown, Trina Rizzo

Division Director: Vanessa Hayden Directors: Karen Adams-Taylor, Sue Sherrill, Carmela Ware 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, Advertising and Production Services: Susan Chiara, Linda Christian, Mary Anne Donley, Euwanaha Joiner-Smith, Brian McCartney, Sean O'Donnell, Noemi Olmo, Ryan Patella, Carole Piszker, Cindy Rendlen, Denise Steinhauser, Ellen Yoshihara Circulation Processing: Bernadette Bauer, Julie Burton, Rosa Eng, Felicia Kyles, Lawrence Majkszak, Kathryn Osten Composition and New Media: Rebecca Aiken, Gail Barrett, Regina Brownlee, Brenda Chandler-Grayer, Amy Evers, Domenic Fosco, Mary Ann Kuranda, Sandra Lopez, Bruce McGregor, Ted Piwowar, La'son Diggs Sledge, Angela Smits, 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 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 2004 by the American Medical Association. All rights reserved. Reproduction without permission is prohibited.