[1] Beijing Jishuitan Hosp, Dept Radiol, Natl Ctr Orthopaed, Beijing, Peoples R China
[2] Beijing Jishuitan Hosp, Natl Ctr Orthopaed, Dept Traumat Orthoped, Beijing, Peoples R China
[3] FAU Univ Erlangen Nurnberg, Dept Med 3, Erlangen, Germany
[4] Univ Klinikum Erlangen, Erlangen, Germany
[5] Leiden Univ, Med Ctr, Dept Internal Med, Ctr Bone Qual, Leiden, Netherlands