title: Study: majority of middle-aged Americans at risk of developing hypertension.
mesh_terms: D000367:Age Factors; D005500:Follow-Up Studies; D006801:Humans; D006973:Hypertension / Q000209:etiology* / Q000517:prevention & control; D008019:Life Style; D008875:Middle Aged; D012306:Risk; D014481:United States