Columbia subject headings:
AIDS (Disease)--Risk factors--Mexico.
Sexually transmitted diseases--Risk factors--Mexico.
Teenagers--Diseases--Mexico.
Teenagers--Sexual behavior--Mexico.
Young adults--Diseases--Mexico.
Young adults--Sexual behavior--Mexico.
Harvard subject headings:
Princeton subject headings:
AIDS (Disease)--Risk factors--Mexico.
Sexually transmitted diseases--Risk factors--Mexico.
Teenagers--Diseases--Mexico.
Teenagers--Sexual behavior--Mexico.
Young adults--Diseases--Mexico.
Young adults--Sexual behavior--Mexico.