The Lifespan hospital system encompasses five hospitals in the state; Rhode Island Hospital, Hasbro Children's Hospital, The Miriam Hospital, Bradley Hospital and Newport Hospital.
The Care New England (CNE) health system is comprised of Butler Hospital, Kent Hospital and Women & Infants Hospital of Rhode Island. CNE also has a Find A Doctor tool on their website.
If you are interested, the NIH has a section on Children and Clinical Studies that focuses on the importance of research in children.