1. Department of Nutritional SciencesWisconsin Regional Primate Research CenterUniversity of WisconsinMadison Wisconsin 53705 USA
2. Department of Pathology and Laboratory MedicineWisconsin Regional Primate Research CenterUniversity of WisconsinMadison Wisconsin 53705 USA
3. Department of Pathology and Laboratory Medicine ServiceGeriatric Research, Education and Clinical CenterWilliam S. Middleton VA HospitalMadison Wisconsin 53705 USA
4. Obesity Research CenterSt. Luke’s/Roosevelt Hospital, Columbia University College of Physicians & SurgeonsNew York New York
5. Department of Physiology and Biophysics, School of MedicineCase Western Reserve UniversityCleveland Ohio 44106 USA
6. Department of MedicineWisconsin Regional Primate Research CenterUniversity of WisconsinMadison Wisconsin 53705 USA
7. Wisconsin Regional Primate Research CenterUniversity of WisconsinMadison Wisconsin 53705 USA
8. Geriatric Research, Education and Clinical CenterWilliam S. Middleton VA HospitalMadison Wisconsin 53705 USA