. Author manuscript; available in PMC: 2019 Sep 4.
Published in final edited form as: Lancet Infect Dis. 2019 Jul 25;19(9):973–987. doi: 10.1016/S1473-3099(19)30156-2
This is an Open Access article under the CC BY 4.0 license (https://creativecommons.org/licenses/by/4.0/).