Seasonal affective disorder & light: past, present and future.
D001696:Biomechanical Phenomena; D006801:Humans; D008027:Light; D019964:Mood Disorders / Q000209:etiology* / Q000503:physiopathology / Q000628:therapy; D010789:Phototherapy; D011570:Psychiatry / Q000639:trends*; D012621:Seasons