 For example, a symposium at the 2007 American Association for the Advancement of Science (AAAS) meeting explored the contribution of endocrine disruption to obesity and metabolic disorder.As is often the case, there is strong animal evidence but few epidemiological tests of predictions based on the animal experiments.A 2006 analysis of Center for Disease Control (CDC) data found an extraordinary increase in risk to type II diabetes as a function of exposure to persistent organic pollutants (POPs), in particular synthetic organic chemicals such as organohalogens.