title: [Timed overnight urinary sodium, potassium and blood pressure in middle-aged men and women in urban rural populations in north and south China].
mesh_terms: D000328:Adult; D001794:Blood Pressure; D001835:Body Weight; D002681:China; D005260:Female; D006801:Humans; D006973:Hypertension / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D011188:Potassium / Q000652:urine*; D012424:Rural Population; D012494:Sampling Studies; D012964:Sodium / Q000652:urine*; D014505:Urban Population
chemical_list: D012964:Sodium; D011188:Potassium