how to calculate pack years of cigarettes do I a patient's pack-year smoking history? What is a “Pack Year”?

There are currently over 750 known strains, and the list continues to grow

Stress from a new job caused Wei, who asked that his full name be withheld out of fear of repercussions for talking to foreign media, to start smoking shortly after leaving graduate school in 2006

Policy The birth control pill is a type of oral contraception that uses hormones to prevent pregnancy

Post took full advantage of the fact that the venue where the interview took place apparently sympathized with the Cigs Inside Movement, as he had a dart in his hand for a good chunk of a chat where the habit eventually became the topic of conversation

You can also turn to our smoking cessation resource center, which has advice, stories from others, and more