[1] Barts & London Queen Marys Sch Med & Dent, Wolfson Inst Populat Hlth, London, England
[2] Queens Univ Belfast, Sch Med Dent & Biomed Sci, Belfast, North Ireland
[3] Northern IrelandMed Dent Training Agcy, Belfast, North Ireland
[4] Royal Victoria Hosp, Ctr Publ Hlth, Inst Clin Sci, Belfast, North Ireland
[5] Univ Glasgow, Sch Hlth & Wellbeing, Glasgow, Scotland