If you are feeling sad or low, you are not alone.  The Center for Disease Control states that in 2009, one in 10 Americans suffered from depression, while a more recent study by the World Health Organization estimated that almost 20{f1cbbec8c52242e0435b0f8ae193f61eb53614017266a91800a694fa5707c0ea} of Americans have experienced an extended period of depression, and that the US has