@article {1504146,
	title = {Annotating temporal information in clinical narratives},
	journal = {Journal of Biomedical Informatics},
	volume = {6},
	number = {Supplement},
	year = {2013},
	pages = {S5-S12},
	url = {https://doi.org/10.1016/j.jbi.2013.07.004},
	author = {Weiyi Sun and Anna Rumshisky and {\"O}zlem Uzuner}
}
