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by dorfsmay 4630 days ago
http://www.ncbi.nlm.nih.gov/pubmed/9415946

I'm not talking about not sleeping well, I'm talking about sleep deprivation, less than 4 hours, when I normally need between 7 to 9 hours.

Also, we are all slightly different, what works for one person might not work for another (we are all an experience of one).