Illustration Regenerated Esophagus (IMAGE) Karolinska Institutet Caption After two weeks in vivo regeneration, the scaffold of the esophagus is covered by a multi-layered, keratinized epithelium. Credit Paolo Macchiarini and colleagues / <i>Nature Communications</i> Usage Restrictions This image may only be used in connection to media reports about the findins by Paolo Macchiarini presented in <i>Nature Communications</i>, April 2014. 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.