1 Faculty of Medicine, Department of Metabolism, Digestion and Reproduction, Division of Digestive Diseases, Queen Elizabeth the Queen Mother Wing, St Mary's Campus, Imperial College, London W2 1NY, UK.
2 Unité d'Épidémiologie des Maladies Émergentes, Institut Pasteur, Paris, France.
3 Pathology, International Centre for Reproductive Health Kenya, Mombasa, Kenya.
4 Centre for Virus Research, Kenya Medical Research Institute, Nairobi, Kenya.
5 National Reference Center for Viral Hepatitis B, C and D, Department of Virology, Hôpital Henri Mondor, Université Paris-Est, Créteil, France.
6 The KEMRI Graduate School Training Centre, Kenya Medical Research Institute, Nairobi, Kenya.
7 Faculty of Medicine, Department of Metabolism, Digestion and Reproduction, Division of Digestive Diseases, Queen Elizabeth the Queen Mother Wing, St Mary's Campus, Imperial College, London W2 1NY, UK. Electronic address: m.lemoine@imperial.ac.uk.