The authors regret that in the original published version of this article, the second institutional affiliation for Nelly Njiru was inadvertently omitted. This corrigendum serves to add the missing affiliation and change from the word institute to department in the second affiliation (b). The authors apologize for this oversight and confirm that the correction does not affect the scientific content or conclusions of the article.
The authors would like to apologize for any inconvenience caused.
