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Dr. Gregory Smith, MD, MPH earned his medical degree from Rush Medical School in Chicago, and a Master 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 part of his practice since that time. He is the author of Medical Cannabis: Basic Science and Clinical Applications, the first scientifically-based textbook directed at educating medical students and medical professionals on the science and applications of cannabinoid medications.