. . "Mental Disorders etiology." . . "Aminosäurenstoffwechselstörung." . . "Psychische Störung Tryptophanmangel." . . "Stupor." . . "Parkinson Disease complications." . . "Tryptophan." . . "Cognition Disorders." . . "Tryptophanmangel Psychische Störung." . . "Tryptophan deficiency." . . "Serotonin blood." . . . . . . . . . . . . . "Tryptophan deficiency stupor : a new psychiatric syndrome" . . . "Tryptophan deficiency stupor - a new psychiatric syndrome" . . . . . . . . . . . . . . . "Carcinoid Tumor complications." . . "Coma: etiology." . .