@misc{indiciae239ceac9273e,
  title = {Persistent occupational koilonychia.},
  author = {N B Pedersen},
  year = {1982},
  doi = {10.1111/j.1600-0536.1982.tb04159.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/7067448/},
  note = {Source identifier: 7067448}
}