@article{Šípek2002a,
author = {Šípek, A. and Horáček, J. and Gregor, V. and Rychtaříková, J. and Dzúrova, D. and Mašátová, D.},
title= {Neural tube defects in the Czech Republic during 1961-1999: Incidences, prenatal diagnosis and prevalences according to maternal age},
year = {2002a},
journal = {Journal of Obstetrics & Gynaecology},
volume = {22},
number = {5},
pages = {501--507},
}