@article{Andersen1999,
author = {Andersen, T.F. and Madsen, M. and Jørgensen, J. and Mellemkjær, L. and Olsen, J.H.},
title= {A valuable source of data for modern health sciences},
year = {1999},
journal = {The Danish National Hospital Register},
volume = {46},
pages = {263--268},
}