What Is New in Stage 3 of the 2019 Revised Association Research Circulation Osseous Staging System of Osteonecrosis of the Femoral Head: A Relationship to Bone Resorption

From the ∗Department of Radiology, St Vincent's Hospital, College of Medicine, The Catholic University of Korea

†Department of Orthopaedic Surgery, Center for Joint Diseases, Kyung Hee University Hospital at Gangdong, Seoul, Republic of Korea

Received for publication October 14, 2022; accepted February 7, 2023.

Correspondence to: Seul Ki Lee MD, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea 93 Jungbu-daero, Paldal-gu, Suwon-si, 16247, Gyeonggi-do, Republic of Korea (e-mail: [email protected]).

The authors declare no conflict of interest.

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