title: The authors respond.
authors.forename: Lekan
authors.initials: L
authors.lastname: Ayo-Yusuf
authors.forename: Ratilal
authors.initials: R
authors.lastname: Lalloo
authors.forename: Newell W
authors.initials: NW
authors.lastname: Johnson
mesh_terms: D005006:Ethnicity / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D009062:Mouth Neoplasms / Q000208:ethnology*; D009959:Oropharyngeal Neoplasms / Q000208:ethnology*