Figura 1.
Grado de tabaquismo.
CO: monóxido de carbono; IPA: índice años/paquete. Fuente: Jiménez-Ruiz et al.1.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.