title: Failure of the clonidine growth hormone stimulation test to differentiate multiple system atrophy from early or advanced idiopathic Parkinson's disease.
authors.forename: C E
authors.initials: CE
authors.lastname: Clarke
authors.forename: P S
authors.initials: PS
authors.lastname: Ray
authors.forename: J M
authors.initials: JM
authors.lastname: Speller
mesh_terms: D000316:Adrenergic alpha-Agonists; D000368:Aged; D001284:Atrophy; D001342:Autonomic Nervous System Diseases / Q000175:diagnosis*; D003000:Clonidine; D003937:Diagnosis, Differential; D019382:Human Growth Hormone / Q000097:blood* / Q000378:metabolism; D006801:Humans; D008875:Middle Aged; D010300:Parkinson Disease / Q000175:diagnosis*
chemical_list: D000316:Adrenergic alpha-Agonists; D019382:Human Growth Hormone; D003000:Clonidine