Columbia subject headings:
Medical care--Ecuador--Oriente.
Public health--Ecuador--Oriente.
Harvard subject headings:
Medical care--Ecuador--Oriente.
Public health--Ecuador--Oriente.
Princeton subject headings:
Health surveys--Amazon River Valley.
Health surveys--Ecuador--Oriente.
Medical care--Amazon River Valley.
Medical care--Ecuador--Oriente.
Public health--Amazon River Valley.
Public health--Ecuador--Oriente.