@article{Kojima2018,
author = {Kojima, G. and Iliffe, S. and Walters, K.},
title= {Frailty index as a predictor of mortality: A systematic review and meta-analysis},
year = {2018},
doi = {10.1093/ageing/afx162},
volume = {47},
number = {2},
pages = {193--200},
}