To accurately assess the level of second-hand smoke exposure, researchers tested for cotinine, which is produced when nicotine is metabolized.

VOA: standard.2010.06.15

The agency notes cultural differences, views and attitudes toward suicide influence whether people will attempt suicide and whether suicides will be accurately reported The WHO report says most suicides in occur in Asia, which accounts for up to But it reports Eastern European countries have the highest rates of suicide.

VOA: standard.2009.09.10