[1] Univ Antwerp, Fac Med & Hlth Sci, Lab Expt Med & Pediat, Antwerp, Belgium
[2] Univ Ziekenhuis Antwerpen, Edegem, Belgium
[3] Univ Antwerp, Ctr Evaluat Vaccinat CEV, Viral Hepatitis Prevent Board, VAXINFECTIO, Antwerp, Belgium
[4] US Ctr Dis Control & Prevent CDC, Div Viral Hepatitis, Atlanta, GA USA
[5] Hosp Gen Univ Valle Hebron, Barcelona, Spain
[6] Univ Antwerp, Ctr Evaluat Vaccinat CEV, Viral Hepatitis Prevent Board, VAXINFECTIO, Drie Eikenstr 663, B-2650 Antwerp, Belgium