TY - JOUR A1 - Sezgin, D. A1 - O’Donovan, M. A1 - Cornally, N. A1 - Liew, A. A1 - O’Caoimh, R. T1 - Defining frailty for healthcare practice and research: A qualitative systematic review with thematic analysis Y1 - 2019 DO - 10.1016/j.ijnurstu.2018.12.014 VL - 92 ER -