@article{liu1999-9920102,
  author  = {Liu, Rong‐Yu and Zhou, Jiang‐Ning and van Heerikhuize, Joop J. and Hofman, Michel A. and Swaab, Dick Frans},
  title   = {{Decreased Melatonin Levels in Postmortem Cerebrospinal Fluid in Relation to Aging, Alzheimer’s Disease, and Apolipoprotein E-ε4/4 Genotype1}},
  journal = {The Journal of Clinical Endocrinology \& Metabolism},
  year    = {1999},
  doi     = {10.1210/jcem.84.1.5394},
  pmid    = {9920102},
  url     = {https://doi.org/10.1210/jcem.84.1.5394}
}