Columbia subject headings:
Harvard subject headings:
Diseases--Bolivia.
Diseases--Peru.
Drug utilization--Bolivia.
Drug utilization--Peru.
Health surveys--Bolivia.
Health surveys--Peru.
Medical care--Utilization--Bolivia.
Medical care--Utilization--Peru.
Princeton subject headings:
Drug utilization--Bolivia.
Drug utilization--Peru.
Medical care--Bolivia.
Medical care--Peru.
Public health--Bolivia.
Public health--Peru.