@article{ahierarchicalfeatureconstraintto,
  title = {A Hierarchical Feature Constraint to Camouflage Medical Adversarial Attacks},
  author = {Qingsong Yao and Zecheng He and Yi Lin and Kai Ma and Yefeng Zheng and S. Kevin Zhou},
  year = {2020},
  eprint = {2012.09501},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2012.09501v2},
}