1. Department of Physiology and Barshop Institute for Longevity and Aging Studies, University of Texas Health Science Center, 15355 Lambda Drive, San Antonio, TX 78245, USA
2. Geriatric Research Education and Clinical Center, South Texas Veterans Healthcare System, San Antonio, TX 78229, USA
3. Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in Western China, and College of Life Science, Ningxia University, Yinchuan, Ningxia 750021, China