1 Regional Advisory Unit for Imported and Tropical Diseases, Oslo University Hospital Ullevål, Oslo 0424, Norway; Department of Paediatrics, Vestfold Hospital Trust, Tønsberg, Norway. Electronic address: stian@orlien.no.
2 Regional Advisory Unit for Imported and Tropical Diseases, Oslo University Hospital Ullevål, Oslo 0424, Norway; Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia.
3 Institute for Liver & Digestive Health, University College London, London, UK.
4 Regional Advisory Unit for Imported and Tropical Diseases, Oslo University Hospital Ullevål, Oslo 0424, Norway; Department of Infectious Diseases, Vestfold Hospital Trust, Tønsberg, Norway.