What are the benefits of taking part in a clinical trial?  Why are those people who use tobacco more likely to develop cancer.  What about using marijuana/CBD products, or holistic cancer treatments?  Why are cancer drugs so expensive?   Radiation Oncologist Dr. Perez-Tamayo answers some of the most common questions asked, as well as discusses some misconceptions about cancer treatments and outcomes in the second installment of a two-part series on Cancer Explained with Central Care Cancer Center.