@article{automaticallyidentifyingcomparatorgroups,
  title = {Automatically Identifying Comparator Groups on Twitter for Digital Epidemiology of Pregnancy Outcomes},
  author = {Ari Z. Klein and Abeselom Gebreyesus and Graciela Gonzalez-Hernandez},
  year = {2019},
  eprint = {1908.06015},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1908.06015v1},
}