@article{yang x2013neutropenia,
  title={Cyclic Neutropenia Presenting as Recurrent Oral Ulcers and Periodontitis},
  author={chen y, fang l,yang x},
  journal={Journal of Clinical Pediatric Dentistry},
  volume={37},
  number={3},
  pages={307--308},
  doi = {10.17796/jcpd.37.3.n8k0111177074828},
  year={2013}
}