This project was supported by the Food and Drug Administration (FDA) of the U.S. Department of Health and Human Services (HHS) as part of a financial assistance award [U24FD006543] totaling $273,666 with 100 percent funded by FDA/HHS during the project period 01-September-2018 through 31-August-2022. The contents are those of the author(s) and do not necessarily represent the official views of, nor an endorsement, by FDA/HHS, or the U.S. Government. Subsequent funding support for incorporation and real-world usage of this project into the Childhood Arthritis Research and Rheumatology Alliance (CARRA Registry) data warehouse at Boston Children’s Hospital is being provided by CARRA, Inc.