1 Subjects: “...low-income adults...”

2 Subjects: “...low-to-middle income...”

3 Subjects: “...low- and middle-income country...”

4 Subjects: “...income gap...”

5 Subjects: “...income...”

6 Subjects: “...gross income...”

7 Subjects: “...income distribution...”

8 Subjects: “...faculty income...”

9 Subjects: “...household income...”

10 Subjects: “...urban-rural income gap...”

11 Subjects: “...income-related inequality of health...”

12 Subjects: “...income...”

13 Subjects: “...low-income...”