tobacco smoke contains carcinogens Smokeless and cigarette smoking: chemical mechanisms and cancer prevention The mutagenic effect of tobacco

John, Paul and George were all expert at it but it's Paul who most frequently turns a good song into a great one with his supporting vocals, often by deploying that remarkable upper register at the climactic moment of a song

For item number 8 the response codes were different, but to make these more comparable, we report the proportion of clients responding yes with the proportion of staff who responded with always or very often or often, combined

Explanatory variable We selected three categories of explanatory variables: socio-demographic, geographic and access to information

It can damage blood vessels and reduce blood flow to the penis, making it harder to get or maintain an erectioneven when using medications like Viagra