Journal of the
AMERICAN DIETETIC ASSOCIATION The premier source for the practice and science of food, nutrition, and dietetics
EDITOR-IN-CHIEF Linda Van Horn, PhD, RD
RESEARCH EDITOR Sujata Archer, PhD, RD
JOURNAL STAFF Editorial Director Jennifer F. Herendeen
ASSOCIATE EDITOR Kimberly Thedford, MS, RD
Contributing Editor Judith Beto, PhD, RD, FADA
Editors Jason T. Switt Ryan Lipscomb
Assistant to the Editor-in-Chief Claire Zulkey
EDITORIAL BOARD Janine Baer, PhD, RD
Judy Driskell, PhD, RD
Melinda Manore, PhD, RD
University of Dayton, Dayton, OH
University of Nebraska, Lincoln
Leila T. Beker, PhD, RD
Jane Geders, MD, PhD, RD, FADA
Oregon State University, Corvallis
US Food and Drug Administration, College Park, MD
Carol Boushey, PhD, MPH, RD Purdue University, West Lafayette, IN
Yvonne Bronner, ScD, RD Morgan State University, Baltimore, MD
Barbara Bruemmer, PhD, RD University of Washington, Seattle
Catherine M. Champagne, PhD, RD, FADA Louisiana State University, Baton Rouge
Mount Kisco Medical Group, Mount Kisco, NY
Bonnie L. Gerald, PhD, DTR
Barbara Millen, DrPH, RD
Rebecca A. Gould, PhD, RD
Linda Nebeling, PhD, MPH, RD, FADA
Kansas State University, Manhattan
National Cancer Institute, Bethesda, MD
Patricia M. Guenther, PhD, RD
Julie O’Sullivan-Maillet, PhD, RD, FADA
US Department of Agriculture, Alexandria, VA
Jeffrey Harris, DrPH, RD, CNS West Chester University, West Chester, PA
Satya Jonnalagadda, PhD, RD Novartis Medical Nutrition, St Louis Park, MN
Deborah E. Kipp, PhD, RD
University of Cincinnati, Cincinnati, OH
University of North Carolina, Greensboro
DeBusk Communications, LC, Tallahassee, FL
Linda Delahanty, MS, RD Harvard Medical School, Boston, MA
Drexel University, Philadelphia, PA
Louisiana Tech University, Ruston
Sarah Collins Couch, PhD, RD
Ruth DeBusk, PhD, RD
Shortie McKinney, PhD, RD, FADA
Mary J. Kretsch, PhD, RD US Department of Agriculture, Davis, CA
Carolyn Leontos, MS, RD University of Nevada Cooperative Extension, Las Vegas
Boston University, Boston, MA
University of Medicine and Dentistry of New Jersey, Newark
Carol Porter, PhD, RD, FADA University of California, San Francisco
Mary Story, PhD, RD University of Minnesota, Minneapolis
Amy Subar, PhD, MPH, RD National Cancer Institute, Bethesda, MD
Christine Lewis Taylor, PhD, RD World Health Organization, Geneva, Switzerland
Mary Ann Van Duyn, PhD, MPH, RD National Cancer Institute, Bethesda, MD
EDITOR EMERITUS Elaine R. Monsen, PhD, RD Journal of the American Dietetic Association (ISSN 0002-8223) is published monthly by Elsevier. (For Post Office use only: Volume 105 issue 2 of 12.) Corporate and Editorial Offices: The Curtis Center, Independence Square West, Philadelphia, PA 19106-3399. Known Office of Publication, Accounting and Circulation Offices: 6277 Sea Harbor Drive, Orlando, FL 32887-4800. Periodicals postage rate paid at Orlando, FL 32862, and additional mailing offices. POSTMASTER: Send address changes to Journal of the American Dietetic Association, Elsevier, Periodicals Department, 6277 Sea Harbor Drive, Orlando, FL 32887-4800. © 2005 by the American Dietetic Association. All rights reserved. No part of this publication may be produced or transmitted in any form or by any means now or hereafter known, electronic or mechan-
ical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the Publisher. Printed in the United States of America on acid-free paper. The American Dietetic Association is an Equal Opportunity Employer. Telephone: 312/899-0040. Neither the Association, the Editor, nor the Publisher assumes responsibility for the opinions expressed by authors of papers abstracted, quoted, or published in full in the Journal. Publication of an advertisement in the Journal should not be construed as endorsement by the Association of the product or the advertiser. “The Journal of the American Dietetic Association” is registered in the US Patent and Trademark Office by the American Dietetic Association.