title: The prevalence of secondary hypertension in elderly hypertensive patients.
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D006973:Hypertension / Q000175:diagnosis* / Q000209:etiology / Q000628:therapy; D006977:Hypertension, Renal / Q000175:diagnosis; D006978:Hypertension, Renovascular / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D012083:Renin / Q000097:blood
chemical_list: D012083:Renin