title: Coexistence of mania and depression.
mesh_terms: D000544:Alzheimer Disease / Q000150:complications / Q000175:diagnosis; D003704:Dementia / Q000150:complications* / Q000175:diagnosis; D003866:Depressive Disorder / Q000150:complications* / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D012107:Research Design