Subjects assigned or randomized to treatment with GH will be provided with GH for the duration of their participation in the study. Enrolled subjects will return every four months to monitor progress. Subjects will undergo a physical examination at each visit, including height, weight, head circumference, and body fat. In addition, subjects assigned or randomized to growth hormone will have laboratory testing of thyroid, IGF-1 and IGFBP-3 hormones, and fasting lipid levels.