Sleep: Luxury or Necessity?

The modern pace of life often makes many of us neglect sleep. We mistakenly think that it takes too much time, which can be spent on doing something more important. Is it possible to sleep less or is it worth giving up this idea? 

We decided to ask Choi En Djun, Doctor of Medical Sciences and Chief Physician of the Center of European and Oriental Medicine, Member of American Society of Clinical Oncology (ASCO), European Society for Medical Oncology (ESMO), Association of oncologists of Russia.