1. Centre for International Health, Department of Global Public Health and Primary Care, Faculty of Medicine and Dentistry, University of Bergen, 5007 Bergen, Norway
2. Department of Clinical Science, Faculty of Medicine and Dentistry, University of Bergen, 5007 Bergen, Norway
3. National Centre for Tropical Infectious Diseases, Medical Department, Haukeland University Hospital, 5021 Bergen, Norway
4. Department of Pathology, Haukeland University Hospital, 5021 Bergen, Norway
5. Department of Clinical Medicine, Faculty of Medicine and Dentistry, University of Bergen, 5007 Bergen, Norway
6. Department of Pathology and Laboratory Medicine, University of Texas Health Sciences Centre at Houston, Houston, TX 77030, USA
7. Department of Thoracic Medicine, Haukeland University Hospital, 5021 Bergen, Norway