title: Reply from the authors.
authors.affiliation: Departments of Internal Medicine             Gastroenterology and Hepatology             Pathology             Experimental Immunology             Vascular Medicine             Experimental Vascular Medicine             Clinical Research Unit, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands             Department of Paediatrics, University of Oxford, Oxford, UK             HIV Pathogenesis Program, Doris Duke Medical Research Institute, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa.
authors.forename: Kathelijne
authors.initials: K
authors.lastname: Dik
authors.forename: Joep
authors.initials: J
authors.lastname: de Bruijne
authors.forename: R Bart
authors.initials: RB
authors.lastname: Takkenberg
authors.forename: Joris J
authors.initials: JJ
authors.lastname: Roelofs
authors.forename: Marjan J
authors.initials: MJ
authors.lastname: Tempelmans
authors.forename: Marcel G W
authors.initials: MG
authors.lastname: Dijkgraaf
authors.forename: Huub C
authors.initials: HC
authors.lastname: Gelderblom
authors.forename: Henk W
authors.initials: HW
authors.lastname: Reesink
authors.forename: Joost C M
authors.initials: JC
authors.lastname: Meijers
authors.forename: Peter L
authors.initials: PL
authors.lastname: Jansen
authors.forename: Marcel
authors.initials: M
authors.lastname: Levi