title: Major depressive disorder (MDD) is a prevalent illness associated with marked disability and substantial socioeconomic burden. Introduction.
mesh_terms: D017281:Cost of Illness; D003865:Major Depressive Disorder / Q000503:physiopathology*; D004185:Disability Evaluation; D006233:Persons with Disabilities / Q000523:psychology*; D019468:Disease Management; D006801:Humans