@article{Harville2007,
author = {Harville, E.W. and Wilcox, A.J. and Lie, R.T. and Abyholm, F. and Vindenes, H.},
title= {Epidemiology of cleft palate alone and cleft palate with accompanying defects},
year = {2007},
doi = {10.1007/s10654-007-9129-y},
journal = {European Journal of Epidemiology},
volume = {22},
number = {6},
pages = {389--395},
}