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Trans R Soc Trop Med Hyg 2014; 108: 601–607
The authors would like to apologise for an error in the originally published paper.
On two occasions, the number of endemic countries is cited as 14; this should be 13. This occurs in the abstract (line 4) and in the Epidemiology subsection (paragraph 2) on p.1.
The author apologises for any inconvenience caused.
