1. Medical Department; St. Paul's Hospital Millennium Medical College; Addis Ababa Ethiopia
2. Centre National de Référence des Hépatites B, C et Delta; Hôpitaux Universitaires Paris- Seine-Saint-Denis; Paris Bobigny France
3. Aklilu Lemma Institute of Pathobiology; Addis Ababa University; Addis Ababa Ethiopia
4. Centre for Imported and Tropical Diseases; Oslo University Hospital, Ullevål; Oslo Norway
5. Research Unit; Sørlandet Hospital HF; Kristiansand Norway
6. Department of Global Development and Planning; University of Agder; Kristiansand Norway
7. Department of Molecular Biology; Norwegian Institute of Public Health; Oslo Norway
8. Department of Vaccine Preventable Diseases; Norwegian Institute of Public Health; Oslo Norway