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.
Process used to estimate excess cancer risk in bystanders exposed to cigarette smoke or heated tobacco product (HTP) aerosol under usual indoor conditions. Excess cancer risk was calculated using nicotine concentration results obtained by the Japanese Ministry of Health, Labour and Welfare, and unit risk calculated by Stephens [9].
