Deputy Editors:
David C. Goff Jr, MD, PhD, Winston-Salem, North Carolina
Leo I. Gordon, MD, Chicago, Illinois
Patrick G. O'Malley, MD, MPH, Washington, DC
Hemant K. Roy, MD, Evanston, Illinois

Associate Editors:
Janardan D. Khandekar, MD, Evanston, Illinois
Robert A. Phillips, MD, PhD, Worcester, Massachusetts

Statistical Editors: Associate: Alan R. Dyer, PhD, Chicago, Illinois
Assistant: Denise M. Scholtens, PhD, Chicago, Illinois

Assistant Editor:
Kathleen M. McKibbin, MD, Winnetka, Illinois

Editorial Assistant:
Arawa McClendon, Chicago, Illinois

SECTION EDITORS
CME: Robert Golub, MD, Chicago, Illinois
Controversies: Ann B. Nattinger, MD, MPH, Milwaukee, Wisconsin

EDITORIAL BOARD
Charles L. Bennett, MD, PhD, Chicago, Illinois
JudyAnn Bigby, MD, Boston, Massachusetts
Martin J. Blaser, MD, New York, New York
Robert D. Brook, MD, Ann Arbor, Michigan
Mary Cushman, MD, MSc, Burlington, Vermont
Rodney H. Falk, MD, Boston, Massachusetts
Ann R. Falsey, MD, Rochester, New York
Mark N. Feinglos, MD, CM, Durham, North Carolina
Elyse Foster, MD, San Francisco, California
Jeffrey L. Glassroth, MD, Chicago, Illinois
Robert J. Goldberg, PhD, Worcester, Massachusetts
Kurt Kroenke, MD, Indianapolis, Indiana
Henry T. Lynch, MD, Omaha, Nebraska
Mary M. McDermott, MD, Chicago, Illinois
Karen Margolis, MD, MPH, Minneapolis, Minnesota
Carlos F. Mendes de Leon, PhD, Chicago, Illinois
Michael Pignone, MD, MPH, Chapel Hill, North Carolina
Bruce M. Psaty, MD, PhD, MPH, Seattle, Washington
Kathryn M. Rexrode, MD, MPH, Boston, Massachusetts
Kenneth G. Saag, MD, MSc, Birmingham, Alabama
Mary E. Tinetti, MD, New Haven, Connecticut
Jack Zwanziger, PhD, MBA, Chicago, Illinois

PUBLICATION STAFF
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Catherine D. DeAngelis, MD, MPH
Editor in Chief
Scientific Publications & Multimedia Applications
Cheryl Iverson: Managing Editor

Editorial Processing Department

Department Director: Paula Glitman
Manuscript Editing Manager: Lauren B. Fischer
Senior Manuscript Editors: Dee E. Egger, John McFadden, Donald S. Smith
Manuscript Editor: Karen L. Boyd
Freelance Manuscript Editing Manager: Diane L. Cannon
Freelance Manuscript Editing Coordinators: Vickey Golden, Mary A. Kingzette, Connie L. Manno
Freelance Copy Editors and Copyreaders: Catherine A. Alden, Lisa M. Cluver, Mary Coerver-Connolly, Allison Esposito, GeorgeMary Gardner, Robin Husayko, Laura King, Nicole C. Netter, Caroline Woods
Editorial Systems Managers: Paul Frank, Monica Mungle
Systems Programmer/Internet Specialist: J.D. Neff
Editorial Assistant: Wanda Hill

Scientific Publications & Multimedia Applications

Executive Assistant to the Editor: Marla A. Hall

Scientific Online Resources

Director: Margaret Winker, MD
Electronic Media Department Director: Michelle Kurzynski
Associate Web Editors: Christopher Hastings, Peter Kim
Web Administrative Assistant: Reuben Rios

PERIODIC PUBLISHING & BUSINESS STAFF
Senior VP & Publisher: Robert A. Musacchio, PhD

Advertising Sales & Marketing

Division Director: Jeffery J. Bonistalli
Manager: Kathy Russell
Staff: Mirna Monal, Jennifer Seminerio
Sales Representatives: Peter G. Messina, Patricia Quilty

Assistant Publisher, Classified Advertising/Circulation Promotion: Geoffrey Flick
Manager: Thalia Moss
Staff: Tem Harrier, Kim Jenkins, Allison Kruse, Michelle Sharpe
Director, Marketing Support Services: Mark Thornbury
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Journal Sales & Online Business

Division Director: Richard Newman
Director, Worldwide Sales: Vida Damijonaitis
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Staff: Millette Jackson-Bates, Sara Nicholson
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Publishing Operations

Division Director: Vanessa Hayden
Directors: Karen Adams-Taylor, Sue Sherrill
Managers: David Antos, Karen Branham, Suzanne J. Bukovsky, Debbie Camp, Susan Chiara, Diane Darnell, Susana Eloy de Vitale, Karl Elvin, Mary Ellen Johnston, Michael McGraw, Chris Meyer, Sean O’Donnell, Sean Ohlson, Phil O'Leary, Ryan Patella, Susan Price, James Schleitwiler, Stacy Tucker
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Circulation Processing: Julie Burton, Michael Deegan, Rosa Eng, Donovan Hanson, Felicia Kyles, Kathryn Osten
Composition and New Media: Gail Barrett, Regina Brownlee, Brenda Chandler-Grayer, Scott Curl, Amy Evers, Teri Hutchison, Mary Ann Kuranda, Joshua Lampinen, Patricia E. Panek, La'son Diggs Sledge, George Thomson
Graphics: Joe Amft, Maria Duda, Fred Furtner, Carolyn Hall, Maria Kowalkowski, JoAnne Weiskopf
Proofreading: Carol Joy Farrell, Daniel James, Judith A. Literskis, Teresa H. Omiotek, Barbara Wojtowicz, Agnes A. Zarkadas

AMA EXECUTIVES
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 2008 by the American Medical Association. All rights reserved. Reproduction without permission is prohibited.