[1] Maynooth Univ, Maynooth, Kildare, Ireland
[2] Univ Coll Cork, Sch Med, Ctr Gerontol & Rehabil, Cork, Ireland
[3] Royal Grp Hosp Trust, Clin Res Support Ctr, Belfast, Antrim, North Ireland
[4] Queens Univ Belfast, Ctr Publ Hlth, Belfast, Antrim, North Ireland