Hypertension   Blood pressure   Overweight   Sodium   Potassium   Feeding behavior   Dietary sodium   Sodium administration & dosage   Potassium administration & dosage   Cardiovascular prevention   Dietary potassium   Salt intake   Potassium deficiency   Human   Female   Male   Adult   Middle aged   Aged   Hypertension   Cohort studies   Blood pressure   Italy   Hypertension physiopathology   Hypertension etiology   Italy epidemiology   Sodium blood   Potassium blood   Sodium adverse effects