Sources Page

http://www.mayoclinic.org/diseases-conditions/dysthymia/basics/definition/con-20033879

http://www.mayoclinic.org/diseases-conditions/depression/basics/definition/con-20032977

http://www.mayoclinic.org/diseases-conditions/bipolar-disorder/basics/definition/con-20027544

http://www.depressionny.com/q&a.htm

http://allpsych.com/disorders/mood/bipolar/#.VZwEMGDvbzJ