@misc{indiciae90564efa10bf,
  title = {Human serum melatonin changes during the menstrual cycle.},
  author = {L Wetterberg and J Arendt and L Paunier and P C Sizonenko and W Donselaar and T Heyden},
  year = {1976},
  doi = {10.1210/jcem-42-1-185},
  url = {https://pubmed.ncbi.nlm.nih.gov/1249188/},
  note = {Source identifier: 1249188}
}