The importance of rigorous methods in observational comparative effectiveness studies of rare diseases: comment on the article by Ruperto et al

Affiliations

• ¹ Joseph M. Sanzari Children's Hospital, and Hackensack Meridian School of Medicine, Hackensack, NJ.
• ² Harvard Medical School, and Harvard Pilgrim Health Care Institute, Boston, MA.
• ³ University of Toronto, Toronto, Ontario, Canada.
• ⁴ Seattle Children's Hospital, Seattle, WA.
• ⁵ Duke University Medical Center and Childhood Arthritis and Rheumatology Research Alliance, Durham, NC.
• ⁶ The Hospital for Sick Children, Toronto, Ontario, Canada.
• ⁷ Duke Clinical Research Institute, Durham, NC.
• ⁸ Childhood Arthritis and Rheumatology Research Alliance, Milwaukee, WI.
• ⁹ Louisiana State Department of Health, New Orleans, LA.
• ¹⁰ Boston Children's Hospital Massachusetts General Hospital and Harvard Medical School, Boston, MA.