@misc{indiciae4a32a7c93942,
  title = {Hepatitis B surface antigen: regional variation in sub-type ratio in the Canadian Red Cross donor population.},
  author = {J P Valet and J Matte and A P O'Connell and J Duravetz},
  year = {1975},
  url = {https://pubmed.ncbi.nlm.nih.gov/47783/},
  note = {Source identifier: 47783}
}