<diacritize> Stephan Rossner , a professor of health behavior at the Karolinska Institute in Stockholm , Sweden , agrees and went so far as to claim : There is no country in the world where obesity is not increasing . <yor>Stephan Rössner , a professor of health behavior at the Karolinska Institute in Stockholm , Sweden , agrees and went so far as to claim : There is no country in the world where obesity is not increasing . 