Eduardo Broitman, MD, Namasivayam Ambalavanan, MD, Rosemary D. Higgins, MD, Betty R. Vohr, MD, Abhik Das, PhD, Brinda Bhaskar, MS, Kennan Murray, MPH, Susan R. Hintz, MD, and Waldemar A. Carlo, MD, for the National Institute of Child Health and Human Development Neonatal Research Network, Birmingham, Alabama, Bethesda, Maryland, Providence, Rhode Island, Research Triangle Park, North Carolina, and Palo Alto, California

Early Umbilical Cord Clamping Contributes to Elevated Blood Lead Levels among Infants with Higher Lead Exposure 506

Camila M. Chaparro, PhD, Raymond Fornes, MS, Lynnette M. Neufeld, PhD, Gilberto Tena Alavez, MD, Raúl Eguía-Líz Cedillo, MD, and Kathryn G. Dewey, PhD, Davis, California, and Cuernavaca and Mexico D.F., Mexico

50 Years Ago in The Journal of Pediatrics—Medical Progress: Hyaline Membrane Disease 512

Alan H. Jobe, MD, PhD, Cincinnati, Ohio

Park-Based Obesity Intervention Program for Inner-City Minority Children 513

Cresendo L. Bush, MEd, Shadston Pittman, Siripoom McKay, MD, Tina Ortiz, William W. Wong, PhD, and William J. Klish, MD, Houston, Texas

50 Years Ago in The Journal of Pediatrics—Growth and Development: I. Relation of Birth Weight in Negro Infants to Sex, Maternal Age, Parity, Prenatal Care, and Socioeconomic Status 517

Janice F. Davis, BA, and Paul Graham Fisher, MD, Palo Alto, California

Daytime Sleepiness and Associated Factors in Japanese School Children 518

Alexandru Gaina, MD, PhD, Michikazu Sekine, MD, MSc, PhD, Shimako Hamanishi, MHPEd, Xiaoli Chen, MPH, PhD, Hongbing Wang, MD, PhD, Takashi Yamagami, MD, and Sadanobu Kagamimori, MD, PhD, Toyama, Japan

Body Mass Index in Children with Newly Diagnosed Inflammatory Bowel Disease: Observations from Two Multicenter North American Inception Cohorts 523

Subra Kugathasan, MD, Justin Nebel, BA, Joseph A. Skelton, MD, James Markowitz, MD, David Keljo, MD, PhD, Joel Rosh, MD, Neal LeLeiko, MD, David Mack, MD, Anne Griffiths, MD, FRCP(C), Athos Bousvaros, MD, MPH, Jonathan Evans, MD, Adam Mezoff, MD, Susan Moyer, MD, Maria Oliva-Hemker, MD, Anthony Otley, MD, Mariann Pfefferkorn, MD, Wallace Crandall, MD, Robert Wyllie, MD, and Jeffrey Hyams, MD, Wisconsin Pediatric Inflammatory Bowel Disease Alliance and Pediatric Inflammatory Bowel Disease Collaborative Research Group, Milwaukee, Wisconsin, New Hyde Park, New York, Pittsburgh, Pennsylvania, Morristown, New Jersey, Providence, Rhode Island, Ottawa and Toronto, Ontario, Canada, Boston, Massachusetts, Jacksonville, Florida, Dayton, Cincinnati, Columbus, and Cleveland, Ohio, Baltimore, Maryland, Halifax, Nova Scotia, Indianapolis, Indiana, and Hartford, Connecticut

Uterine Development in Turner Syndrome 528

Vladimir K. Bakalov, MD, Thomas Shawker, MD, Irene Ceniceros, BS, and Carolyn A. Bondy, MD, Bethesda, Maryland

Parental Opinions about Clinical Research 532

Marilyn C. Morris, MD, Deborah Besner, BA, Hector Vazquez, MD, Robert M. Nelson, MD, PhD, and Ruth L. Fischbach, PhD, New York, New York, and Philadelphia, Pennsylvania

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Grand Rounds

Metabolic Cardiomyopathy and Mitochondrial Disorders in the Pediatric Intensive Care Unit 538

Jason M. Kane, MD, FAAP, Janet Rossi, MD, FAAP, Sabrina Tsao, MBBS, MRCP (UK), and Barbara K. Burton, MD, FAAP, Chicago, Illinois

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Clinical and Laboratory Observations

Ethnic Differences in Extreme Obesity 542

Ailsa Goulding, PhD, FACN, Andrea M. Grant, MSc, Rachael W. Taylor, PhD, Sheila M. Williams, DSc, Winsome R. Parnell, PhD, Noela Wilson, PhD, and Jim Mann, DM, PhD, FRACP, Dunedin, New Zealand

Ratio of High-, Medium-, and Low-Molecular Weight Serum Adiponectin to the Total Adiponectin Value in Children 545

Rimei Nishimura, MD, MPH, Aya Morimoto, MD, Toru Matsudaira, MD, Yumi Miyashita, MD, Hironari Sano, MD, Takako Shirasawa, ME, Eiko Takahashi, MD, PhD, and Naoko Tajima, MD, MsHyg, Tokyo, Japan, and Pittsburgh, Pennsylvania

Time Trends in the Incidence of Acute Lymphoblastic Leukemia among Children 1976-2002: A Population-Based Nordic Study 548

Anne Louise Svendsen, PhD, Maria Feychting, PhD, Lars Klæboe, PhD, Frøydis Langmark, MD, and Joachim Schüz, PhD, Copenhagen, Denmark, Stockholm, Sweden, and Oslo, Norway

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Insights

Complete Vascular Ring 551

Shyh-Jye Chen, MD, PhD, and Kao-Lang Liu, MD, Taipei, Taiwan

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Current Best Evidence

Clinical Research Abstracts for Pediatricians 552

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Letters to the Editor

The following section is available in the online version of The Journal.

Factors Influencing Capillary Refill Time e17

Michael Eisenhut, MD, Luton, Bedfordshire, United Kingdom

Reply e17

Jennifer Evans, MD, MRCP, Kumasi, Ghana

Neurologic Complications in Children Hospitalized with Influenza: Comparison Between USA and Hong Kong e17

Brian HY Chung, MBBS (Hons), MRCPCH, DCH, FHKAM, Anita MC Tsang, MBBS, MRCP, DCH, FHKAM, and Virginia CN Wong, MBBS, MRCP, FRCP, FRCPCH, DCH, FHKAM, FHKCPaed, Hong Kong

Reply e18

Jason G. Newland, MD, V. Matt Laurich, MD, Anna W. Rosenquist, MD, Kateri Heydon, MS, Daniel J. Licht, MD, Ron Keren, MD, MPH, Theoklis Zaoutis, MD, MSCE, Richard L. Hodinka, PhD, Susan E. Coffin, MD, MPH, and Barbara Watson, MBChB, Kansas City, Missouri, New York, New York, Boston, Massachusetts, and Philadelphia, Pennsylvania

Benefits of Nasal Intermittent Mandatory Ventilation for Preterms e19

Jucille Meneses, MD, Recife, PE Brazil

Reply e19

Amir Kugelman, MD, Arieh Riskin, MD, and David Bader, MD, MHA, Haifa, Israel

The Importance of Avoiding Head Flexion in Preterm Infants e20

Shirley L. Tonkin, MBChB, Christine G. McIntosh, MBChB, and Alistair J. Gunn, MBChB, PhD, Auckland, New Zealand

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