@article {1490129,
	title = {Symptom severity classification with gradient tree boosting},
	journal = {Journal of Biomedical Informatics},
	volume = {75},
	number = {Supplement},
	year = {2017},
	pages = {S105-S111},
	url = {https://doi.org/10.1016/j.jbi.2017.05.015},
	author = {Liu, Yang and Yu Gu and John Chu Nguyen and Haodan Li and Jiawei Zhang and Gao, Yuan and Yang Huang}
}
