[1] Queens Univ Belfast, Unit Nursing & Midwifery Res, Belfast Hlth & Social Care Trust, Belfast, Antrim, North Ireland
[2] Univ Ulster, Fac Life & Hlth Sci, Coleraine BT52 1SA, Londonderry, North Ireland
[3] Univ Ulster, Belfast Hlth & Social Care Trust, Sch Nursing, Coleraine BT52 1SA, Londonderry, North Ireland