1. Department of Clinical Neuroscience and Rehabilitation; Institute of Neuroscience and Physiology; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
2. The Swedish School of Sport and Health Sciences and Karolinska University Hospital; Stockholm Sweden
3. The Institute of Stress Medicine; Gothenburg Sweden
4. The Copenhagen City Heart Study; Copenhagen Denmark
5. Department of Public Health and Community Medicine; Institute of Medicine; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
6. Department of Biostatistics; Institute of Basic Medical Sciences; University of Oslo; Oslo Norway
7. Copenhagen Muscle Research Centre; University of Copenhagen; Copenhagen Denmark