Developing comparative effectiveness studies for a rare, understudied pediatric disease: lessons learned from the CARRA juvenile localized scleroderma consensus treatment plan pilo... oleh Suzanne C. Li, Robert C. Fuhlbrigge, Ronald M. Laxer, Elena Pope, Maria F. Ibarra, Katie Stewart, Thomas Mason, Mara L. Becker, Sandy Hong, Fatma Dedeoglu, Kathryn S. Torok, C. Egla Rabinovich, Polly J. Ferguson, Marilynn Punaro, Brian M. Feldman, Tracy Andrews, Gloria C. Higgins, For the CARRA Registry Investigators