title: Authors' reply to Wight.
authors.affiliation: University College London, London WC1E 6JB, UK.
authors.forename: Delan
authors.initials: D
authors.lastname: Devakumar
authors.affiliation: London School of Hygiene and Tropical Medicine, London, UK.
authors.forename: Kate L
authors.initials: KL
authors.lastname: Mandeville
authors.affiliation: University College London, London WC1E 6JB, UK.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Hall
authors.affiliation: Queen Mary University of London, London, UK.
authors.forename: Shailen
authors.initials: S
authors.lastname: Sutaria
authors.affiliation: King's College London, London, UK.
authors.forename: Ingrid
authors.initials: I
authors.lastname: Wolfe