title: Diagnostic Criteria as Separate From Classification Criteria: A Perpetual Motion Machine? Comment on the Article by Aggarwal et al.
authors: Academic Hospital, Uskudar, Istanbul, Turkey.
authors: Hasan
authors: H
authors: Yazici
authors: Istanbul University Cerrahpasa Medical School, Istanbul, Turkey.
authors: Gulen
authors: G
authors: Hatemi
authors: New York University Hospital for Joint Diseases, New York, New York.
authors: Yusuf
authors: Y
authors: Yazici