@article{Clegg2013,
author = {Clegg, A. and Young, J. and Iliffe, S. and Rikkert, M.O. and Rockwood, K.},
title= {Frailty in elderly people},
year = {2013},
doi = {10.1016/S0140-6736(12)62167-9},
volume = {381},
number = {9868},
pages = {752--762},
}