[1] Univ Newcastle, Coll Hlth & Wellbeing, Sch Med & Publ Hlth, Callaghan, Australia
[2] Hunter Med Res Inst, New Lambton Hts, NSW, Australia
[3] Maroondah Hosp, Eastern Hlth, Melbourne, Vic, Australia
[4] Univ Newcastle, Sch Med & Publ Hlth, Callaghan, NSW 2308, Australia