@article{7b2a1829b98441e2a93f091faca02823,
title = "Register-based data indicated nonparticipation bias in a health study among aging people",
keywords = "Ageing, bias, health, nonresponse, registers, survey, Ageing, bias, health, nonresponse, registers, survey",
author = "Olli Nummela and Tommi Sulander and Satu Helakorpi and Ilkka Haapola and Antti Uutela and Heikki Heinonen and Raisa Valve and Mikael Fogelholm",
year = "2011",
doi = "10.1016/j.jclinepi.2011.04.003",
language = "English",
volume = "64",
pages = "1418--1425",
journal = "Journal of Clinical Epidemiology ",
issn = "0895-4356",
publisher = "Elsevier",
number = "12",
}
