@misc{indiciaed52f2235e266,
  title = {Amniotic fluid beta-endorphin levels and labor.},
  author = {G D Kofinas and A D Kofinas and M Pyrgerou and F I Reyes},
  year = {1987},
  url = {https://pubmed.ncbi.nlm.nih.gov/2952913/},
  note = {Source identifier: 2952913}
}