Peter Byass, Umeå University (image) Umea University Share Print E-Mail Caption This is Peter Byass, epidemiologist at Umeå University and co-author of the article. Credit Mattias Pettersson Usage Restrictions This photo may only be used in the context related to this press release. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.