Field Work in Tanzania (IMAGE) University of Pennsylvania Caption A nurse from the Kilimanjaro Christian Medical Center, works in the field with a study participant in Tanzania. Credit Alessia Ranciaro/Tishkoff Lab Usage Restrictions In context of reporting 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.