@article{Ward1993,
author = {Ward, M.M. and Leigh, J.P.},
title= {Marital status and the progression of functional disability in patients with rheumatoid arthritis},
year = {1993},
doi = {10.1002/art.1780360502},
journal = {Arthritis and Rheumatism},
volume = {36},
number = {5},
pages = {581--588},
}