1. UConn Center on Aging, University of Connecticut School of Medicine, Farmington, CT, USA
2. Department of Immunology, University of Connecticut School of Medicine, Farmington, CT, USA
3. Department of Molecular Biology and Immunology, University of North Texas Health Science Center at Fort Worth, Fort Worth, TX, USA
4. Department of Comparative Biomedical Sciences, Royal Veterinary College, University of London, UK