title: Dopamine D2 receptor density in parkinsonian brain is constant for duration of disease, age, and duration of L-dopa therapy.
mesh_terms: D001921:Brain / Q000473:pathology*; D002421:Caudate Nucleus / Q000473:pathology; D006801:Humans; D007980:Levodopa / Q000627:therapeutic use*; D010300:Parkinson Disease / Q000188:drug therapy / Q000473:pathology*; D011699:Putamen / Q000473:pathology; D011954:Receptors, Dopamine / Q000187:drug effects / Q000378:metabolism*; D017448:Receptors, Dopamine D2
chemical_list: D011954:Receptors, Dopamine; D017448:Receptors, Dopamine D2; D007980:Levodopa