@article{Bowling2008,
author = {Ann Bowling and Joy Windsor},
title = {The effects of question order and response-choice on self-rated health status in the English Longitudinal Study of Ageing (ELSA)},
journal = {Journal of Epidemiology and Community Health},
year = {2008},
month = {Jan},
volume = {62},
number = {1},
pages = {81-85},
url = {http://jech.bmj.com/cgi/content/abstract/62/1/81},
}