1. Wallenberg Laboratory; Sahlgrenska University Hospital; SE-41345 Göteborg Sweden
2. Department of Cardiology; Sahlgrenska University Hospital; SE-41345 Göteborg Sweden
3. Department of Pathology; Sahlgrenska University Hospital; SE-41345 Göteborg Sweden
4. Department of Clinical Physiology; Sahlgrenska University Hospital; SE-41345 Göteborg Sweden
5. Department of Internal Medicine, Research Center for Endocrinology and Metabolism; Gröna Stråket 8, Sahlgrenska University Hospital; SE-41345 Göteborg Sweden