1. Department of Medicine, NU Hospital Group, Uddevalla, Sweden.
2. Department of Molecular and Clinical Medicine, University of Gothenburg, Gothenburg, Sweden.
3. Department of Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden.
4. Statistiska Konsultgruppen, Gothenburg, Sweden.
5. AstraZeneca R&D, Mölndal, Sweden.
6. Departments of Laboratory Medicine and Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.