1. Service d'Hépato-Gastro-Entérologie; Hôpital Purpan; Université Paul Sabatier III; Toulouse France
2. Royal Cornwall Hospital Trust; Truro UK
3. Glasgow Royal Infirmary; Glasgow UK
4. Glasgow Caledonian University; Glasgow UK
5. Scottish National Blood Transfusion Service; Edinburgh UK
6. Norfolk and Norwich University Hospitals NHS Foundation Trust; Norwich UK
7. Laboratoire de virologie; Hôpital Purpan; CHU de Toulouse; Toulouse France
8. INSERM, U1043; Toulouse France
9. Université Toulouse III Paul Sabatier; Toulouse France
10. Health Protection Scotland; Glasgow UK