@article{Mucci2004,
author = {Mucci, L.A. and Hsieh, C.-C. and Williams, P.L. and Dickman, P.W. and Björkman, L. and Pedersen, N.L.},
title= {Birth order, sibship size, and housing density in relation to tooth loss and periodontal disease: A cohort study among Swedish twins},
year = {2004},
doi = {10.1093/aje/kwh063},
journal = {American Journal of Epidemiology},
volume = {159},
number = {5},
pages = {499−506},
}