How-Ran Guo, MD, MPH, ScD, is a Distinguished Professor affiliated with the Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University (NCKU), Tainan, Taiwan and serves as the Director of the Occupational Safety, Health, and Medicine Research Center of the school. He is also an Attending Staff of the Department of Occupational and Environmental Medicine of the NCKU Hospital and jointly appointed as a Professor by the Graduate Institute of Clinical Medicine, Department of Public Health, Department of Occupational and Environmental Medicine, and Department of Food Safety/Hygiene and Risk Management of the NCKU. He received his medical degree from the Taipei Medical College (currently the Taipei Medical University) and earned a Master of Public Health, a Master of Science in Epidemiology, and a Doctor of Science in Environmental Health (major in Occupational Medicine, minor in Epidemiology and Biostatistics) from the Harvard University in the U.S.A. He has also completed the Epidemic Intelligence Service Officer training in the Center for Disease Control and Prevention of the U.S. government. He is the first Fellow of the American College of Occupational and Environmental Medicine who is awarded the honor on the basis of clinical qualification in Taiwan and helped the Taiwanese government establish the special board in Occupational Medicine. Over the years, he has actively participated in professional associations and is now serving as the President of the Taiwan Occupational Health Service Association, Vice President of the Asian Association of Occupational Health (AAOH), and Executive Council Member of the Taiwan Epidemiology Association. He had served as the President of the Taiwan Environmental and Occupational Medicine Association (TEOMA). He is the funding Chair of the East Asia Chapter (now expended to the Asia and Western Pacific Chapter) of the International Society for Environmental Epidemiology and a founding member and Council Member of and the Taiwan Chapter of the International Medical Geology Association. Dr. Guo has broad research interests in both occupational and environmental health and has published hundreds of articles in peer-reviewed journals.