title: Letter: Plasma-catecholamines in sleeping hypertensives.
mesh_terms: D000328:Adult; D002395:Catecholamines / Q000097:blood*; D006801:Humans; D006973:Hypertension / Q000097:blood*; D008875:Middle Aged; D012890:Sleep
chemical_list: D002395:Catecholamines