@article{Holt-Lunstad2010,
author = {Holt-Lunstad, J. and Smith, T.B. and Layton, J.B.},
title= {Social relationships and mortality risk: A meta-analytic review},
year = {2010},
doi = {10.1371/journal.pmed.1000316},
journal = {PLoS Med },
volume = {7},
number = {7},
}