Alexandra M. Sims, M.D., FAAP (IMAGE) Children's National Hospital Caption This is Alexandra M. Sims, M.D., FAAP, a General Academics Pediatric Fellow at Children’s National Hospital. Credit Children’s National Hospital Usage Restrictions No limitations on use other than to credit Children’s National Hospital 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.