Stephan Rossner Professor Stephan Rossner MD PhD is professor of health behavior research at the Karolinska institute in Stockholm, Sweden and director of the Obesity Unit at the Karolinska University Hospital, Huddinge Stockholm. He has worked with internationa obesity related matters for more than 20 years and served as the Secretary, Vice President and eventually President of the International Association for the Study of Obesity (IASO). He has published more than 500 scientific articles on nutrition and life style related matters, written more than 20 books for the lay press, appeared repeatedly in media and also promoted health as a stand-up comedian in so-called science theatre. Read More Read Less