1. Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet and Stockholm University, Stockholm 171 65, Sweden
2. Division of Clinical Geriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Solna 171 64, Sweden
3. Stockholm Gerontology Research Center, Stockholm 113 30, Sweden
4. Stress Research Institute, Stockholm University, Stockholm 114 19, Sweden