@misc{indiciaec366839f04f4,
  title = {Collagen shields.},
  author = {W H Johnston and K L Wellish and F Beltran and B J Mondino},
  year = {1993},
  doi = {10.1097/00004397-199303340-00010},
  url = {https://pubmed.ncbi.nlm.nih.gov/8258502/},
  note = {Source identifier: 8258502}
}