[1] Oslo Univ Hosp Ulleval, Reg Ctr Imported & Trop Dis, Oslo, Norway
[2] Oslo Univ Hosp, Oslo Ctr Biostat & Epidemiol, Oslo, Norway
[3] Addis Ababa Univ, Aklilu Lemma Inst Pathobiol, Addis Ababa, Ethiopia
[4] Haramaya Univ, Coll Hlth & Med Sci, Harar, Ethiopia
[5] Norwegian Inst Publ Hlth, Dept Mol Biol, Oslo, Norway
[6] Univ Agder, Dept Global Dev & Planning, Kristiansand S, Norway
[7] Sorlandet Hosp HF, Res Unit, Kristiansand S, Norway
[8] UCL, UCL Inst Liver & Digest Hlth, London, England