@misc{indiciae715fcae617e7,
  title = {Do plasma melatonin concentrations decline with age?},
  author = {J M Zeitzer and J E Daniels and J F Duffy and E B Klerman and T L Shanahan and D J Dijk and C A Czeisler},
  year = {1999},
  doi = {10.1016/s0002-9343(99)00266-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/10569297/},
  note = {Source identifier: 10569297}
}