@misc{indiciaefb456f241b18,
  title = {Do plasma melatonin concentrations decline with age?},
  author = {Zeitzer, J. M. and Daniels, J. E. and Duffy, J. F. and Klerman, E. B. and Shanahan, T. L. and Dijk, D. J. and Czeisler, C. A.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20040141767},
  note = {Source identifier: 20040141767}
}