[1] Johns Hopkins University School of Medicine,Received from Medical Scientist Training Program
[2] Johns Hopkins Bloomberg School of Public Health,the Department of Epidemiology
[3] Center for Outcomes Research,the Departments of Pediatrics and Anesthesia
[4] The Children’s Hospital of Philadelphia,The Children’s Hospital of Philadelphia
[5] University of Pennsylvania School of Medicine,the Department of Anesthesia
[6] The Hospital of the University of Pennsylvania,Department of Anesthesiology and Critical Care Medicine
[7] University of Pennsylvania School of Medicine,undefined
[8] the Children’s Hospital of Philadelphia,undefined