title: Depression research: an objective view of gloomy outlook.
mesh_terms: D001288:Attention; D003863:Depression / Q000378:metabolism*; D004298:Dopamine / Q000378:metabolism*; D006801:Humans; D012107:Research Design; D012160:Retina / Q000378:metabolism*; D012684:Sensory Thresholds; D014796:Visual Perception
chemical_list: D004298:Dopamine