@article{Kravdal2020,
author = {Kravdal, Ø and Magnus, P. and Moum, B. and Høivik, M.L.},
title= {Association of childbearing with a short-term reduced risk of Crohn disease in mothers},
year = {2020},
doi = {10.1093/aje/kwz285},
volume = {189},
number = {4},
pages = {294--304},
}