Distinctions between diagnostic and classification criteria?

Affiliations

• ¹ University of Pittsburgh, Pittsburgh, Pennsylvania.
• ² Seattle Children's Hospital, Seattle, Washington.
• ³ University of Michigan, Ann Arbor.
• ⁴ Boston University School of Medicine, Boston, Massachusetts.
• ⁵ Toronto Western Hospital, Mount Sinai Hospital, and University of Toronto, Toronto, Ontario, Canada.
• ⁶ American College of Rheumatology, Atlanta, Georgia.
• ⁷ Cincinnati Children's Hospital and Medical Center, Cincinnati, Ohio.
• ⁸ University of California, Los Angeles.
• ⁹ University of Pennsylvania, Philadelphia.
• ¹⁰ Medical University of Vienna, Vienna, Austria.
• ¹¹ Toronto Western and Mount Sinai Hospitals, The Hospital for Sick Children, and University of Toronto, Toronto, Ontario, Canada.