@article{Christensen2008,
author = {Christensen, K. and McGue, M. and Petersen, I. and Jeune, B. and Vaupel, J.W.},
title= {Exceptional longevity does not result in excessive levels of disability},
year = {2008},
doi = {10.1073/pnas.0804931105},
journal = {PNAS - Proceedings of the National Academy of Sciences},
volume = {105},
number = {36},
pages = {13274--13279},
}