Sleep and circadian rhythms in health and disease: a complex interplay

  • Nevin F. W. ZakiEmail author
  • David Warren Spence
  • Ahmed S. BaHammam
  • Seithikurippu R. Pandi-Perumal
  • Daniel P. Cardinali
  • Gregory M. Brown
Letter to the Editor




Compliance with ethical standards

Conflict of interest

The authors declare no competing financial interest.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Sleep Research Unit—Department of Psychiatry, Faculty of MedicineMansoura UniversityMansouraEgypt
  2. 2.TorontoCanada
  3. 3.University Sleep Disorders Center, College of MedicineKing Saud UniversityRiyadhSaudi Arabia
  4. 4.Somnogen Canada Inc.TorontoCanada
  5. 5.BIOMED-UCA-CONICET and Department of Teaching and Research, Faculty of Medical SciencesPontificia Universidad Católica ArgentinaBuenos AiresArgentina
  6. 6.Department of Psychiatry, Centre for Addiction and Mental HealthUniversity of TorontoTorontoCanada

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