title: Prophylactic serum lithium levels in recurrent unipolar depression.
mesh_terms: D000328:Adult; D003866:Depressive Disorder / Q000188:drug therapy*; D005260:Female; D006801:Humans; D008094:Lithium / Q000097:blood* / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D012008:Recurrence
chemical_list: D008094:Lithium