Columbia University Medical Center
NewYork-Presbyterian Hospital The University Hospital of Columbia and Cornell
October 15, 2009

SAD, also known as seasonal depression or winter depression, begins affecting people in late fall and can last through early May; in accordance with the time of year when overall daylight is shortest. The specific cause of SAD remains unknown. Now they theorize that it is the earliest morning light exposure that is the critical factor. That

Read more at West Side Spirit">Read more at West Side Spirit

 

hora interior