1 Subjects: “...net income per employee...”

2 Subjects: “...income inequality...”

3 Subjects: “...income disparities...”

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

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

6 Subjects: “...income gap...”

7 Subjects: “...rural household income...”

8 Subjects: “...income level...”

9 Subjects: “...low-income countries...”

10 Subjects: “...faculty income...”

11 Subjects: “...household income...”

12 Subjects: “...income...”

13 Subjects: “...income loss...”

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