[1] Imperial Coll London, London, England
[2] Emory Vaccine Ctr, Atlanta, GA USA
[3] Ctr Geog Med Res, KEMRI Wellcome Trust Res Programme, Nairobi, Kenya
[4] Univ Oxford, Oxford, England
[5] Int AIDS Vaccine Initiat IAVI, Merthyr Tydfil, M Glam, Wales