1. Obesity Research Center, Department of Medicine, St. Luke's-Roosevelt Hospital Center, Columbia University College of Physicians and Surgeons, New York, New York 10025;
2. Clinical Nutrition Research Center, Surge Building, Room 215, University of New Mexico School of Medicine, Albuquerque, New Mexico 87133
3. School of Physical and Health Education, Queen's University, Kingston, Ontario, Canada K7L 3N6