On the Mayo Clinic Radio podcast, Dr. Robert Rizza, an endocrinologist and diabetes expert at Mayo Clinic, discusses diagnosis, treatment and prevention of diabetes. Also on the program, Dr. Rachel Tyndale, research chair in pharmacogenomics at the University of Toronto, explains how pharmacogenomics may lead to better treatments to help people quit smoking. And Dr. William Tatum, a neurologist at Mayo Clinic, discusses epilepsy.