Gustaf Edgren, Karolinska Institutet (IMAGE) Karolinska Institutet Caption Dr. Gustaf Edgren and his colleagues at Karolinska Institutet in Sweden have shown that stored blood does not influence patient outcomes after heart surgery. Credit Åsa Petré Usage Restrictions This image may only be published/reproduced in connection to editorial reports about the research of Dr Gustaf Edgren, Sweden. License Licensed content 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.