Daniel P. Casella, Children's National (IMAGE) Children's National Hospital Caption This is Daniel P. Casella, M.D., a urologist at Children's National. Credit Children's National Usage Restrictions Please credit Children's National 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.