@misc{indiciae9310c5afc10a,
  title = {Regional differences invalidate U.S. sperm trend conclusions.},
  author = {J Heinze},
  year = {1999},
  doi = {10.1289/ehp.107-1566384},
  url = {https://pubmed.ncbi.nlm.nih.gov/10391731/},
  note = {Source identifier: 10391731}
}