Text and Data Mining valid from 2019-12-01
Received: 1 August 2019
Accepted: 24 October 2019
First Online: 5 December 2019
Ethics approval and consent to participate
: Information on data used in this study is available in Swarthout et al. [CitationRef removed], where the carriage study is described in detail.
: Dr. Bar-Zeev reports investigator-initiated research grants from GlaxoSmithKline Biologicals and from Takeda Pharmaceuticals outside the submitted work. The authors declare that they have no competing interests.