@article{Bopp2009,
author = {Bopp, M. and Spoerri, A. and Zwahlen, M. and Gutzwiller, F. and Paccaud, F. and Braun-Fahrländer, C. and Rougement, A. and Egger, M.},
title= {Cohort profile: The Swiss national cohort - a longitudinal study of 6.8 million people},
year = {2009},
doi = {10.1093/ije/dyn042},
journal = {International Journal of Epidemiology},
volume = {38},
number = {2},
pages = {379--384},
}