@article{Liu1995,
author = {Liu, X. and Liang, J. and Muramatsu, N. and Sugisawa, H.},
title= {Transitions in functional status and active life expectancy among older people in Japan},
year = {1995},
journal = {Journals of Gerontology Series B: Psychological Sciences and Social Sciences},
volume = {50},
number = {6},
pages = {S383--S394},
}