Screen-Shot-2013-10-09-at-7.46.28-AM.png (PNG Image, 744 × 514 pixels).
Some good advise from scientists. Thanks to Scot McKnight for the link.
How Long to Nap
Screen-Shot-2013-10-09-at-7.46.28-AM.png (PNG Image, 744 × 514 pixels).
Some good advise from scientists. Thanks to Scot McKnight for the link.
Persona 
