Red Blood Cells, Before And After (IMAGE) Boston Children's Hospital Caption The unedited red blood cells at left include many misshapen 'sickle' cells, shown by red arrows. These largely disappeared in the red blood cells made by gene-edited blood stem cells. Credit Daniel Bauer/Boston Children's Hospital Usage Restrictions None 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.