1. Department of Preventive Medicine and Community Health, University of Texas Medical Branch, Galveston, TX 77555-1109
2. Center for Bioengineering and Department of Neuroscience, University of Texas Medical Branch, Galveston, TX 77555-1109
3. NeuroBioTex, Incorporated, Galveston, TX 77550
4. U.S. Department of Agriculture, Agricultural Research Service Grand Forks Human Nutrition Research Center, Grand Forks, ND 58201