1. Department of Psychiatry, The University of Texas Health Science Center, San Antonio, TX, USA
2. Department of Medicine, The University of Texas Health Science Center, San Antonio, TX, USA
3. Department of Family and Community Medicine, The University of Texas Health Science Center, San Antonio, TX, USA
4. South Texas Veterans' Health System Audie L. Murphy Division GRECC, San Antonio, TX, USA
5. Department of Internal Medicine and Institute for Aging and Alzheimer's Disease Research, University of North Texas Health Sciences Center, Fort Worth, TX, USA