@article{Holmen1990,
author = {Holmen, J. and Midthjell, K. and Forsèn, L. and Skjerve, K. and Gorseth, M. and Oseland, A.},
title= {A health survey in Nord-Trøndelag 1984–1986. Participation and comparison of attendants and non-attendants},
year = {1990},
volume = {110},
number = {15},
pages = {1973--1977},
}