S ≤1 mg/l and R > 4 mg/l S ≤1 mg/l and R > 4 mg/l S ≤1 mg/l and R > 4 mg/l S ≤1 mg/l and R > 1 mg/l S ≤ 1 mg/l and R > 1 mg/l “inappropriate target” S ≤ 1 mg/l and R > 1 mg/l IE (insufficient evidence) S ≤1 mg/l and R > 1 mg/l