@article{Judge2009,
author = {A. Judge and NJ. Welton and J. Sandju and Y. Ben-Shlomo},
title = {Modeling the need for hip and knee replacement surgery. Part 1. A two-stage cross-cohort approach. },
journal = {Arthritis and Rheumatism},
year = {2009},
month = {Dec},
number = {12},
pages = {1657-66},
url = {},
}