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.
Conceptual framework of multiple primary cancers etiology: hypothesized involvement of genetic, environmental, and lifestyle risk factors in etiology of synchronous cancers; and the role of treatment and lifestyle in etiology of metachronous cancers.
