@article{Chou2007,
author = {Kee-Lee Chou},
title = {Reciprocal relationship between pain and depression in older adults: evidence from the English Longitudinal Study of Ageing},
journal = {Journal of Affective Disorders},
year = {2007},
month = {Jan},
volume = {103},
number = {1-3},
pages = {115-123},
url = {http://www.ncbi.nlm.nih.gov/pubmed/17240455},
}