Dr. Gregory Smith, MD, MPH earned his medical degree from Rush Medical School in Chicago, and a Masters of Public Health from Harvard University. He completed residency training in Preventive Medicine at Walter Reed Army Medical Center. Since leaving the US Army with the rank of Major, Doctor Smith has been in primary care practice in California, Georgia and Florida for the past 25 years. He first trained on use of medical cannabis in California in 2000, and has made medical cannabis and CBD oil part of his practice since that time. Dr. Smith is an avid writer, having published two medical textbooks, a novel called Malpractice, and articles with many magazines and over a dozen peer reviewed medical publications. He is the author of CBD: What You Need to Know.