1. Department of Nutrition, Food, and Exercise Sciences, Florida State University, Tallahassee, Florida 32306-1493, Department of Internal Medicine, School of Medicine, University of California, Davis, California 95616, Veterans Affairs Northern California Health Care System, Pleasant Hill, California, Pomology Department, University of California, Davis, California 95616, and Department of Biological Science, Florida State University, Tallahassee, Florida 32306-4370