Prof Liesbeth van Rossum, MD PhD, is internist-endocrinologist and professor in the field of obesity and stress hormone research at the Erasmus University Medical Center, Rotterdam, Netherlands. She is co-founder of the Obesity Center CGG, an internationally recognized academic center of expertise diagnostics of underlying causes of obesity and personalized treatments. Currently, Van Rossum helds various societal and board positions, amongst which European lead of the theme Obesity, Diabetes, Nutrition and Metabolism of the European Society for Endocrinology, member of the European Policy Working Group for obesity, chair of the National Obesity Guideline, and president of the Partnership Overweight Netherlands ( with an advisory role to the Ministry of Health). She received multiple international awards and grants for her scientific research, is a frequently invited speaker. Together with Mariette Boon she wrote an international award-winning book “FAT, the secret organ”.