@misc{indiciae848efca5be81,
  title = {Hepatitis D virus--how prevalent?},
  author = {E van der Ryst and K Cloete and A van Heerden and E J Smit and M M Williams},
  year = {1997},
  url = {https://pubmed.ncbi.nlm.nih.gov/9472257/},
  note = {Source identifier: 9472257}
}