Trying to quit smoking? It’s hard – studies show 70 to 80% of people who try to quit in six months. This is because nicotine is so addictive, says Dr. Ronald G. Crystal, chairman and professor of genetic medicine at…
Trying to quit smoking? It’s hard – studies show 70 to 80% of people who try to quit in six months. This is because nicotine is so addictive, says Dr. Ronald G. Crystal, chairman and professor of genetic medicine at…