title: Letter: Brain-levels of monoamine oxidase in depression.
mesh_terms: D000367:Age Factors; D000368:Aged; D001921:Brain / Q000201:enzymology*; D001923:Brain Chemistry; D003863:Depression / Q000201:enzymology*; D006801:Humans; D008875:Middle Aged; D008995:Monoamine Oxidase / Q000032:analysis*
chemical_list: D008995:Monoamine Oxidase