@misc{indiciaec38cc4d7ff82,
  title = {Changes in alpha-fetoprotein concentrations during storage at -73 degrees C.},
  author = {K J Helsing and G W Comstock and H L Lau and S Linkins},
  year = {1984},
  url = {https://pubmed.ncbi.nlm.nih.gov/6207961/},
  note = {Source identifier: 6207961}
}